{"id":"CVE-2020-27152","aliases":["ALSA-2021:1093","DEBIAN-CVE-2020-27152","EUVD-2020-19676","GHSA-pfwq-4xp5-gp3h","MGASA-2021-0030","MGASA-2021-0031","RHSA-2021:1081","RHSA-2021:1093","UBUNTU-CVE-2020-27152","USN-4752-1"],"status":"published","title":"An issue was discovered in ioapic_lazy_update_eoi in arch/x86/kvm/ioapic.c in the Linux kernel...","description":"An issue was discovered in ioapic_lazy_update_eoi in arch/x86/kvm/ioapic.c in the Linux kernel before 5.9.2. 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Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-27152","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-pfwq-4xp5-gp3h"},{"url":"https://vulners.com/cve/CVE-2020-0466","tags":["report"]},{"url":"https://vulners.com/cve/CVE-2020-27152","tags":["report"]},{"url":"https://vulners.com/cve/CVE-2020-28374","tags":["report"]},{"url":"https://vulners.com/cve/CVE-2021-26708","tags":["report"]},{"url":"https://vulners.com/cve/CVE-2021-27363","tags":["report"]},{"url":"https://vulners.com/cve/CVE-2021-27364","tags":["report"]},{"url":"https://vulners.com/cve/CVE-2021-27365","tags":["report"]},{"url":"https://vulners.com/cve/CVE-2021-3347","tags":["report"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2020-27152","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2021-0030.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=27938","tags":["report"]},{"url":"https://kernelnewbies.org/Linux_5.8","tags":["web"]},{"url":"https://kernelnewbies.org/Linux_5.9","tags":["web"]},{"url":"https://kernelnewbies.org/Linux_5.10","tags":["web"]},{"url":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.1","tags":["web"]},{"url":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.2","tags":["web"]},{"url":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.3","tags":["web"]},{"url":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.4","tags":["web"]},{"url":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.5","tags":["web"]},{"url":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.6","tags":["web"]},{"url":"https://advisories.mageia.org/MGASA-2021-0031.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=27939","tags":["report"]},{"url":"https://access.redhat.com/errata/RHSA-2021:1081","tags":["advisory"]},{"url":"https://access.redhat.com/security/updates/classification/#important","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1888886","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1899804","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1920480","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1922249","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1925588","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1926369","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1930078","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1930079","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1930080","tags":["report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2021/rhsa-2021_1081.json","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2020-0466","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-0466","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-0466","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2020-27152","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-27152","tags":["advisory","report"]},{"url":"https://git.kernel.org/linus/77377064c3a94911339f13ce113b3abf265e06da","tags":["article"]},{"url":"https://www.openwall.com/lists/oss-security/2020/11/03/1","tags":["article","report"]},{"url":"https://access.redhat.com/security/cve/CVE-2020-28374","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-28374","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-28374","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2021-3347","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-3347","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-3347","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2021-26708","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-26708","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-26708","tags":["advisory"]},{"url":"https://www.openwall.com/lists/oss-security/2021/02/04/5","tags":["article"]},{"url":"https://access.redhat.com/security/cve/CVE-2021-27363","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-27363","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-27363","tags":["advisory"]},{"url":"https://www.openwall.com/lists/oss-security/2021/03/06/1","tags":["article"]},{"url":"https://access.redhat.com/security/cve/CVE-2021-27364","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-27364","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-27364","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2021-27365","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-27365","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-27365","tags":["advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2021:1093","tags":["advisory"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2021/rhsa-2021_1093.json","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2020-27152","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-4659-1","tags":["advisory"]},{"url":"https://ubuntu.com/security/notices/USN-4752-1","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2020-10135","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2020-14314","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2020-15436","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2020-15437","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2020-24490","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2020-25212","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2020-25284","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2020-25641","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2020-25643","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2020-25704","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2020-27815","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2020-28588","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2020-28915","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2020-29368","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2020-29369","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2020-29371","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2020-29660","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2020-29661","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2020-35508","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2020-27152","description":"An issue was discovered in ioapic_lazy_update_eoi in arch/x86/kvm/ioapic.c in the Linux kernel before 5.9.2. It has an infinite loop related to improper interaction between a resampler and edge triggering, aka CID-77377064c3a9.","status":"published","published":"2020-11-06T07:46:08Z","modified":"2024-08-04T16:11:35.755Z","updated_at":"2026-11-02T14:35:53.552996Z"}],"euvd":[{"id":"EUVD-2020-19676","description":"An issue was discovered in ioapic_lazy_update_eoi in arch/x86/kvm/ioapic.c in the Linux kernel before 5.9.2. It has an infinite loop related to improper interaction between a resampler and edge triggering, aka CID-77377064c3a9.","status":"published","published":"2020-11-06T07:46:08Z","modified":"2024-08-04T16:11:35Z","updated_at":"2026-11-03T03:07:13.515696Z"}],"ghsa":[{"id":"GHSA-pfwq-4xp5-gp3h","title":"An issue was discovered in ioapic_lazy_update_eoi in arch/x86/kvm/ioapic.c in the Linux kernel...","description":"An issue was discovered in ioapic_lazy_update_eoi in arch/x86/kvm/ioapic.c in the Linux kernel before 5.9.2. It has an infinite loop related to improper interaction between a resampler and edge triggering, aka CID-77377064c3a9.","status":"published","published":"2022-05-24T17:33:19Z","modified":"2023-01-29T05:04:23Z","cwes":["CWE-835"],"updated_at":"2026-11-02T14:45:32.675365Z"}],"nvd":[{"id":"CVE-2020-27152","description":"An issue was discovered in ioapic_lazy_update_eoi in arch/x86/kvm/ioapic.c in the Linux kernel before 5.9.2. It has an infinite loop related to improper interaction between a resampler and edge triggering, aka CID-77377064c3a9.","status":"published","published":"2020-11-06T08:15:13.673Z","modified":"2026-06-17T03:08:52.26Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":2.1,"vector":"AV:L/AC:L/Au:N/C:N/I:N/A:P","level":"low","assessor":"primary"}],"cwes":["CWE-835"],"updated_at":"2026-11-02T14:06:21.80969Z"}],"osv":[{"id":"CVE-2020-27152","description":"An issue was discovered in ioapic_lazy_update_eoi in arch/x86/kvm/ioapic.c in the Linux kernel before 5.9.2. It has an infinite loop related to improper interaction between a resampler and edge triggering, aka CID-77377064c3a9.","status":"published","published":"2020-11-06T08:15:13.673Z","modified":"2026-04-16T04:37:31.842103389Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:44:16.248747Z"},{"id":"DEBIAN-CVE-2020-27152","description":"An issue was discovered in ioapic_lazy_update_eoi in arch/x86/kvm/ioapic.c in the Linux kernel before 5.9.2. It has an infinite loop related to improper interaction between a resampler and edge triggering, aka CID-77377064c3a9.","status":"published","published":"2020-11-06T08:15:13.673Z","modified":"2026-10-26T12:02:41.658005154Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:45:33.729655Z"},{"id":"RHSA-2021:1081","title":"Red Hat Security Advisory: kernel-rt security and bug fix update","status":"published","published":"2024-09-13T22:13:33Z","modified":"2026-08-26T10:01:37Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T15:53:08.071325Z"},{"id":"RHSA-2021:1093","title":"Red Hat Security Advisory: kernel security, bug fix, and enhancement update","status":"published","published":"2024-09-13T22:13:41Z","modified":"2026-08-26T10:01:38Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T15:53:08.071325Z"},{"id":"UBUNTU-CVE-2020-27152","description":"An issue was discovered in ioapic_lazy_update_eoi in arch/x86/kvm/ioapic.c in the Linux kernel before 5.9.2. It has an infinite loop related to improper interaction between a resampler and edge triggering, aka CID-77377064c3a9.","status":"published","published":"2020-11-06T08:15:00Z","modified":"2026-11-06T13:49:14.11276653Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-06T14:21:55.919815Z"},{"id":"ALSA-2021:1093","title":"Important: kernel security, bug fix, and enhancement update","description":"The kernel packages contain the Linux kernel, the core of any Linux operating system.\n\nSecurity Fix(es):\n\n* kernel: use after free in eventpoll.c may lead to escalation of privilege (CVE-2020-0466)\n\n* kernel: SCSI target (LIO) write to any block on ILO backstore (CVE-2020-28374)\n\n* kernel: Use after free via PI futex state (CVE-2021-3347)\n\n* kernel: race conditions caused by wrong locking in net/vmw_vsock/af_vsock.c (CVE-2021-26708)\n\n* kernel: out-of-bounds read in libiscsi module (CVE-2021-27364)\n\n* kernel: heap buffer overflow in the iSCSI subsystem (CVE-2021-27365)\n\n* Kernel: KVM: host stack overflow due to lazy update IOAPIC (CVE-2020-27152)\n\n* kernel: iscsi: unrestricted access to sessions and handles (CVE-2021-27363)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n\nBug Fix(es):\n\n* race condition when creating child sockets from syncookies (BZ#1915529)\n\n* On System Z, a hash needs state randomized for entropy extraction (BZ#1915816)\n\n* scsi: target: core_tmr_abort_task() reporting multiple aborts for the same se_cmd-\u003etag (BZ#1918354)\n\n* [mlx5] VF interface stats are not reflected in \"ip -s link show\" / \"ifconfig \u003cvf\u003e\" commands (BZ#1921060)\n\n* Win10 guest automatic reboot after migration in Win10 and WSL2 on Intel hosts (BZ#1923281)\n\n* [AlmaLinux 8.3] Repeated messages - Unable to burst-read optrom segment (BZ#1924222)\n\n* Backport bug fix RDMA/umem: Prevent small pages from being returned by ib_umem_find_best_pgsz (BZ#1924691)\n\n* [Cisco 8.3] AlmaLinux/Cent 8.2 fNIC driver needs a patch fix that addresses crash (BZ#1925186)\n\n* AlmaLinux8.3 - The kernel misdetects zCX with z/VM (BZ#1925508)\n\n* Backport 22e4663e91 (\"mm/slub: fix panic in slab_alloc_node()\") (BZ#1925511)\n\n* SCTP \"Address already in use\" when no active endpoints from AlmaLinux 8.2 onwards (BZ#1927521)\n\n* lpfc: Fix initial FLOGI failure due to BBSCN not supported  (BZ#1927921)\n\n* [mm] mm, oom: remove oom_lock from oom_reaper (BZ#1929738)\n\n* Unexpected thread movement with AMD Milan compared to Rome (BZ#1929740)\n\n* rpmbuild cannot build the userspace RPMs in the kernel package when the kernel itself is not built (BZ#1929910)\n\n* [Regression] AlmaLinux8.2 - ISST-LTE:pVM:diapvmlp83:sum:memory DLPAR fails to add memory on multiple trials[mm/memory_hotplug.c:1163] (mm-) (BZ#1930168)\n\n* Configuring the system with non-RT kernel will hang the system (BZ#1930735)\n\n* Upstream Patch for Gracefully handle DMAR units with no supported address widthsx86/vt-d (BZ#1932199)\n\n* gfs2: Deadlock between gfs2_{create_inode,inode_lookup} and delete_work_func (BZ#1937109)\n\n* Failing on tsx-ctrl when the flag doesn't change anything (BZ#1939013)\n\nEnhancement(s):\n\n* RFE: Backport all Audit enhancements and fixes up to version 5.10-rc1 (BZ#1907520)\n\n* AlmaLinux8.4: Update the target driver (BZ#1918363)\n\n* [Mellanox 8.4 FEAT] mlx5: Hairpin Support in Switch Mode (BZ#1924689)","status":"published","published":"2021-04-06T13:33:17Z","modified":"2026-10-29T11:00:26.337854494Z","updated_at":"2026-11-02T15:27:51.196609Z"},{"id":"MGASA-2021-0030","title":"Updated kernel packages fix security vulnerabilities","description":"This update provides an upgrade to the new upstream 5.10 longterm branch,\ncurrently based on 5.10.6, adding new features and new and improved\nhardware support.\n\nThis update also fixes at least the following security issues:\n\nIn binder_release_work of binder.c, there is a possible use-after-free due\nto improper locking. This could lead to local escalation of privilege in\nthe kernel with no additional execution privileges needed. User interaction\nis not needed for exploitation (CVE-2020-0423).\n\nIn various methods of hid-multitouch.c, there is a possible out of bounds\nwrite due to a missing bounds check. This could lead to local escalation of\nprivilege with no additional execution privileges needed. User interaction\nis not needed for exploitation (CVE-2020-0465).\n\nInsufficient access control in the Linux kernel driver for some Intel(R)\nProcessors may allow an authenticated user to potentially enable information\ndisclosure via local access (CVE-2020-8694).\n\nA potential vulnerability in the AMD extension to Linux \"hwmon\" service may\nallow an attacker to use the Linux-based Running Average Power Limit (RAPL)\ninterface to show various side channel attacks. In line with industry\npartners, AMD has updated the RAPL interface to require privileged access\n(CVE-2020-12912).\n\nA use-after-free memory flaw was found in the perf subsystem allowing a\nlocal attacker with permission to monitor perf events to corrupt memory and\npossibly escalate privileges. The highest threat from this vulnerability\nis to data confidentiality and integrity as well as system availability\n(CVE-2020-14351).\n\nA use-after-free was found in the way the console subsystem was using ioctls\nKDGKBSENT and KDSKBSENT. A local user could use this flaw to get read\nmemory access out of bounds. The highest threat from this vulnerability is\nto data confidentiality (CVE-2020-25656).\n\nLinux kernel concurrency use-after-free in vt (CVE-2020-25668).\n\nLinux Kernel use-after-free in sunkbd_reinit (CVE-2020-25669).\n\nA flaw memory leak in the Linux kernel performance monitoring subsystem was\nfound in the way if using PERF_EVENT_IOC_SET_FILTER. A local user could use\nthis flaw to starve the resources causing denial of service (CVE-2020-25704).\n\nA flaw in the way reply ICMP packets are limited in the Linux kernel\nfunctionality was found that allows to quickly scan open UDP ports. This\nflaw allows an off-path remote user to effectively bypassing source port UDP\nrandomization. The highest threat from this vulnerability is to\nconfidentiality and possibly integrity, because software that relies on UDP\nsource port randomization are indirectly affected as well (CVE-2020-25705).\n\nAn issue was discovered in ioapic_lazy_update_eoi in arch/x86/kvm/ioapic.c\nin the Linux kernel before 5.9.2. It has an infinite loop related to\nimproper interaction between a resampler and edge triggering (CVE-2020-27152).\n\nAn issue was discovered in the Linux kernel before 5.8.15. scalar32_min_max_or\nin kernel/bpf/verifier.c mishandles bounds tracking during use of 64-bit\nvalues (CVE-2020-27194).\n\nAn issue was discovered in the Linux kernel through 5.9.1, as used with Xen\nthrough 4.14.x. Guest OS users can cause a denial of service (host OS hang)\nvia a high rate of events to dom0 (CVE-2020-27673).\n\nAn issue was discovered in the Linux kernel through 5.9.1, as used with Xen\nthrough 4.14.x. drivers/xen/events/events_base.c allows event-channel removal\nduring the event-handling loop (a race condition). This can cause a\nuse-after-free or NULL pointer dereference, as demonstrated by a dom0 crash\nvia events for an in-reconfiguration paravirtualized device (CVE-2020-27675).\n\nA use-after-free flaw was found in kernel/trace/ring_buffer.c in Linux\nkernel (before 5.10-rc1). There was a race problem in trace_open and resize\nof cpu buffer running parallely on different cpus, may cause a denial of\nservice problem (DOS). This flaw could even allow a local attacker with\nspecial user privilege to a kernel information leak threat (CVE-2020-27825).\n\nLinux kernel NULL-ptr deref bug in spk_ttyio_receive_buf2 (CVE-2020-27830).\n\nA use after free in the Linux kernel infiniband hfi1 driver in versions\nprior to 5.10-rc6 was found in the way user calls Ioctl after open dev\nfile and fork. A local user could use this flaw to crash the system\n(CVE-2020-27835).\n\nlib/syscall: fix syscall registers retrieval on 32-bit platforms\n(CVE-2020-28588).\n\nA buffer over-read (at the framebuffer layer) in the fbcon code in the\nLinux kernel before 5.8.15 could be used by local attackers to read kernel\nmemory (CVE-2020-28915).\n\nAn issue was discovered in drivers/accessibility/speakup/spk_ttyio.c in\nthe Linux kernel through 5.9.9. Local attackers on systems with the\nspeakup driver could cause a local denial of service attack (CVE-2020-28941).\n\nA slab-out-of-bounds read in fbcon in the Linux kernel before 5.9.7 could\nbe used by local attackers to read privileged information or potentially\ncrash the kernel (CVE-2020-28974).\n\nAn issue was discovered in the Linux kernel before 5.9.3. io_uring takes a\nnon-refcounted reference to the files_struct of the process that submitted\na request, causing execve() to incorrectly optimize unshare_fd()\n(CVE-2020-29534).\n\nA locking inconsistency issue was discovered in the tty subsystem of the\nLinux kernel through 5.9.13. drivers/tty/tty_io.c and\ndrivers/tty/tty_jobctrl.c may allow a read-after-free attack against\nTIOCGSID (CVE-2020-29660).\n\nA locking issue was discovered in the tty subsystem of the Linux kernel\nthrough 5.9.13. drivers/tty/tty_jobctrl.c allows a use-after-free attack\nagainst TIOCSPGRP (CVE-2020-29661).\n\nOther changes in this update:\n- xtables-addons have been updated to 3.13 for kernel 5.10 support.\n- aufs-tools have been updated to 5.8.\n\nFor other upstream changes, see the referenced kernelnewbies and changelog\nlinks.\n","status":"published","published":"2021-01-15T12:31:01Z","modified":"2026-04-16T04:44:12.961463455Z","updated_at":"2026-11-02T15:49:41.509337Z"},{"id":"MGASA-2021-0031","title":"Updated kernel-linus packages fix security vulnerabilities","description":"This update provides an upgrade to the new upstream 5.10 longterm branch,\ncurrently based on 5.10.6, adding new features and new and improved\nhardware support.\n\nThis update also fixes at least the following security issues:\n\nIn binder_release_work of binder.c, there is a possible use-after-free due\nto improper locking. This could lead to local escalation of privilege in\nthe kernel with no additional execution privileges needed. User interaction\nis not needed for exploitation (CVE-2020-0423).\n\nIn various methods of hid-multitouch.c, there is a possible out of bounds\nwrite due to a missing bounds check. This could lead to local escalation of\nprivilege with no additional execution privileges needed. User interaction\nis not needed for exploitation (CVE-2020-0465).\n\nInsufficient access control in the Linux kernel driver for some Intel(R)\nProcessors may allow an authenticated user to potentially enable information\ndisclosure via local access (CVE-2020-8694).\n\nA potential vulnerability in the AMD extension to Linux \"hwmon\" service may\nallow an attacker to use the Linux-based Running Average Power Limit (RAPL)\ninterface to show various side channel attacks. In line with industry\npartners, AMD has updated the RAPL interface to require privileged access\n(CVE-2020-12912).\n\nA use-after-free memory flaw was found in the perf subsystem allowing a\nlocal attacker with permission to monitor perf events to corrupt memory and\npossibly escalate privileges. The highest threat from this vulnerability\nis to data confidentiality and integrity as well as system availability\n(CVE-2020-14351).\n\nA use-after-free was found in the way the console subsystem was using ioctls\nKDGKBSENT and KDSKBSENT. A local user could use this flaw to get read\nmemory access out of bounds. The highest threat from this vulnerability is\nto data confidentiality (CVE-2020-25656).\n\nLinux kernel concurrency use-after-free in vt (CVE-2020-25668).\n\nLinux Kernel use-after-free in sunkbd_reinit (CVE-2020-25669).\n\nA flaw memory leak in the Linux kernel performance monitoring subsystem was\nfound in the way if using PERF_EVENT_IOC_SET_FILTER. A local user could use\nthis flaw to starve the resources causing denial of service (CVE-2020-25704).\n\nA flaw in the way reply ICMP packets are limited in the Linux kernel\nfunctionality was found that allows to quickly scan open UDP ports. This\nflaw allows an off-path remote user to effectively bypassing source port UDP\nrandomization. The highest threat from this vulnerability is to\nconfidentiality and possibly integrity, because software that relies on UDP\nsource port randomization are indirectly affected as well (CVE-2020-25705).\n\nAn issue was discovered in ioapic_lazy_update_eoi in arch/x86/kvm/ioapic.c\nin the Linux kernel before 5.9.2. It has an infinite loop related to\nimproper interaction between a resampler and edge triggering (CVE-2020-27152).\n\nAn issue was discovered in the Linux kernel before 5.8.15. scalar32_min_max_or\nin kernel/bpf/verifier.c mishandles bounds tracking during use of 64-bit\nvalues (CVE-2020-27194).\n\nAn issue was discovered in the Linux kernel through 5.9.1, as used with Xen\nthrough 4.14.x. Guest OS users can cause a denial of service (host OS hang)\nvia a high rate of events to dom0 (CVE-2020-27673).\n\nAn issue was discovered in the Linux kernel through 5.9.1, as used with Xen\nthrough 4.14.x. drivers/xen/events/events_base.c allows event-channel removal\nduring the event-handling loop (a race condition). This can cause a\nuse-after-free or NULL pointer dereference, as demonstrated by a dom0 crash\nvia events for an in-reconfiguration paravirtualized device (CVE-2020-27675).\n\nA use-after-free flaw was found in kernel/trace/ring_buffer.c in Linux\nkernel (before 5.10-rc1). There was a race problem in trace_open and resize\nof cpu buffer running parallely on different cpus, may cause a denial of\nservice problem (DOS). This flaw could even allow a local attacker with\nspecial user privilege to a kernel information leak threat (CVE-2020-27825).\n\nLinux kernel NULL-ptr deref bug in spk_ttyio_receive_buf2 (CVE-2020-27830).\n\nA use after free in the Linux kernel infiniband hfi1 driver in versions\nprior to 5.10-rc6 was found in the way user calls Ioctl after open dev\nfile and fork. A local user could use this flaw to crash the system\n(CVE-2020-27835).\n\nlib/syscall: fix syscall registers retrieval on 32-bit platforms\n(CVE-2020-28588).\n\nA buffer over-read (at the framebuffer layer) in the fbcon code in the\nLinux kernel before 5.8.15 could be used by local attackers to read kernel\nmemory (CVE-2020-28915).\n\nAn issue was discovered in drivers/accessibility/speakup/spk_ttyio.c in\nthe Linux kernel through 5.9.9. Local attackers on systems with the\nspeakup driver could cause a local denial of service attack (CVE-2020-28941).\n\nA slab-out-of-bounds read in fbcon in the Linux kernel before 5.9.7 could\nbe used by local attackers to read privileged information or potentially\ncrash the kernel (CVE-2020-28974).\n\nAn issue was discovered in the Linux kernel before 5.9.3. io_uring takes a\nnon-refcounted reference to the files_struct of the process that submitted\na request, causing execve() to incorrectly optimize unshare_fd()\n(CVE-2020-29534).\n\nA locking inconsistency issue was discovered in the tty subsystem of the\nLinux kernel through 5.9.13. drivers/tty/tty_io.c and\ndrivers/tty/tty_jobctrl.c may allow a read-after-free attack against\nTIOCGSID (CVE-2020-29660).\n\nA locking issue was discovered in the tty subsystem of the Linux kernel\nthrough 5.9.13. drivers/tty/tty_jobctrl.c allows a use-after-free attack\nagainst TIOCSPGRP (CVE-2020-29661).\n\nFor other upstream changes, see the referenced kernelnewbies and changelog\nlinks.\n","status":"published","published":"2021-01-15T12:31:01Z","modified":"2026-04-16T04:44:17.961690599Z","updated_at":"2026-11-02T15:49:41.509337Z"},{"id":"USN-4752-1","title":"linux-oem-5.6 vulnerabilities","description":"Daniele Antonioli, Nils Ole Tippenhauer, and Kasper Rasmussen discovered\nthat legacy pairing and secure-connections pairing authentication in the\nBluetooth protocol could allow an unauthenticated user to complete\nauthentication without pairing credentials via adjacent access. A\nphysically proximate attacker could use this to impersonate a previously\npaired Bluetooth device. (CVE-2020-10135)\n\nJay Shin discovered that the ext4 file system implementation in the Linux\nkernel did not properly handle directory access with broken indexing,\nleading to an out-of-bounds read vulnerability. A local attacker could use\nthis to cause a denial of service (system crash). (CVE-2020-14314)\n\nIt was discovered that the block layer implementation in the Linux kernel\ndid not properly perform reference counting in some situations, leading to\na use-after-free vulnerability. A local attacker could use this to cause a\ndenial of service (system crash). (CVE-2020-15436)\n\nIt was discovered that the serial port driver in the Linux kernel did not\nproperly initialize a pointer in some situations. A local attacker could\npossibly use this to cause a denial of service (system crash).\n(CVE-2020-15437)\n\nAndy Nguyen discovered that the Bluetooth HCI event packet parser in the\nLinux kernel did not properly handle event advertisements of certain sizes,\nleading to a heap-based buffer overflow. A physically proximate remote\nattacker could use this to cause a denial of service (system crash) or\npossibly execute arbitrary code. (CVE-2020-24490)\n\nIt was discovered that the NFS client implementation in the Linux kernel\ndid not properly perform bounds checking before copying security labels in\nsome situations. A local attacker could use this to cause a denial of\nservice (system crash) or possibly execute arbitrary code. (CVE-2020-25212)\n\nIt was discovered that the Rados block device (rbd) driver in the Linux\nkernel did not properly perform privilege checks for access to rbd devices\nin some situations. A local attacker could use this to map or unmap rbd\nblock devices. (CVE-2020-25284)\n\nIt was discovered that the block layer subsystem in the Linux kernel did\nnot properly handle zero-length requests. A local attacker could use this\nto cause a denial of service. (CVE-2020-25641)\n\nIt was discovered that the HDLC PPP implementation in the Linux kernel did\nnot properly validate input in some situations. A local attacker could use\nthis to cause a denial of service (system crash) or possibly execute\narbitrary code. (CVE-2020-25643)\n\nKiyin (尹亮) discovered that the perf subsystem in the Linux kernel did\nnot properly deallocate memory in some situations. A privileged attacker\ncould use this to cause a denial of service (kernel memory exhaustion).\n(CVE-2020-25704)\n\nIt was discovered that the KVM hypervisor in the Linux kernel did not\nproperly handle interrupts in certain situations. A local attacker in a\nguest VM could possibly use this to cause a denial of service (host system\ncrash). (CVE-2020-27152)\n\nIt was discovered that the jfs file system implementation in the Linux\nkernel contained an out-of-bounds read vulnerability. A local attacker\ncould use this to possibly cause a denial of service (system crash).\n(CVE-2020-27815)\n\nIt was discovered that an information leak existed in the syscall\nimplementation in the Linux kernel on 32 bit systems. A local attacker\ncould use this to expose sensitive information (kernel memory).\n(CVE-2020-28588)\n\nIt was discovered that the framebuffer implementation in the Linux kernel\ndid not properly perform range checks in certain situations. A local\nattacker could use this to expose sensitive information (kernel memory).\n(CVE-2020-28915)\n\nJann Horn discovered a race condition in the copy-on-write implementation\nin the Linux kernel when handling hugepages. A local attacker could use\nthis to gain unintended write access to read-only memory pages.\n(CVE-2020-29368)\n\nJann Horn discovered that the mmap implementation in the Linux kernel\ncontained a race condition when handling munmap() operations, leading to a\nread-after-free vulnerability. A local attacker could use this to cause a\ndenial of service (system crash) or possibly expose sensitive information.\n(CVE-2020-29369)\n\nJann Horn discovered that the romfs file system in the Linux kernel did not\nproperly validate file system meta-data, leading to an out-of-bounds read.\nAn attacker could use this to construct a malicious romfs image that, when\nmounted, exposed sensitive information (kernel memory). (CVE-2020-29371)\n\nJann Horn discovered that the tty subsystem of the Linux kernel did not use\nconsistent locking in some situations, leading to a read-after-free\nvulnerability. A local attacker could use this to cause a denial of service\n(system crash) or possibly expose sensitive information (kernel memory).\n(CVE-2020-29660)\n\nJann Horn discovered a race condition in the tty subsystem of the Linux\nkernel in the locking for the TIOCSPGRP ioctl(), leading to a use-after-\nfree vulnerability. A local attacker could use this to cause a denial of\nservice (system crash) or possibly execute arbitrary code. (CVE-2020-29661)\n\nIt was discovered that a race condition existed that caused the Linux\nkernel to not properly restrict exit signal delivery. A local attacker\ncould possibly use this to send signals to arbitrary processes.\n(CVE-2020-35508)\n","status":"published","published":"2021-02-25T06:54:20Z","modified":"2026-06-03T14:03:57.617545013Z","updated_at":"2026-11-02T16:58:15.159055Z"}]}}