{"id":"CVE-2021-47342","aliases":["CLSA-2025-1742319747","CLSA-2025-1747430034","CLSA-2025-1762244592","CLSA-2025-1762244848","CLSA-2025-1762332910","DEBIAN-CVE-2021-47342","EUVD-2021-34347","GHSA-c5qq-qcr6-82vp","UBUNTU-CVE-2021-47342"],"status":"published","title":"ext4: fix possible UAF when remounting r/o a mmp-protected file system","description":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix possible UAF when remounting r/o a mmp-protected file system\n\nAfter commit 618f003199c6 (\"ext4: fix memory leak in\next4_fill_super\"), after the file system is remounted read-only, there\nis a race where the kmmpd thread can exit, causing sbi-\u003es_mmp_tsk to\npoint at freed memory, which the call to ext4_stop_mmpd() can trip\nover.\n\nFix this by only allowing kmmpd() to exit when it is stopped via\next4_stop_mmpd().\n\nBug-Report-Link: \u003c20210629143603.2166962-1-yebin10@huawei.com\u003e","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00245,"percentile":0.1581,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-416"],"published":"2024-05-21T14:35:49Z","modified":"2026-10-26T09:31:41Z","fixes":[{"ecosystem":"Debian:12","package":"linux","fixed_in":["5.14.6-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"linux","fixed_in":["5.14.6-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"linux","fixed_in":["5.14.6-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"TuxCare:Ubuntu:18.04","package":"linux-buildinfo-4.15.0-245-tuxcare.els33-generic","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-245.256"}]}],"bundled":29},{"source":"osv","ecosystem":"TuxCare:Ubuntu:18.04","package":"linux-buildinfo-4.15.0-245-tuxcare.els33-lowlatency","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-245.256"}]}],"bundled":29},{"source":"osv","ecosystem":"TuxCare:Ubuntu:18.04","package":"linux-cloud-tools-4.15.0-245-tuxcare.els33","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-245.256"}]}],"bundled":29},{"source":"osv","ecosystem":"TuxCare:Ubuntu:18.04","package":"linux-cloud-tools-4.15.0-245-tuxcare.els33-generic","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-245.256"}]}],"bundled":29},{"source":"osv","ecosystem":"TuxCare:Ubuntu:18.04","package":"linux-cloud-tools-4.15.0-245-tuxcare.els33-lowlatency","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-245.256"}]}],"bundled":29},{"source":"osv","ecosystem":"TuxCare:Ubuntu:18.04","package":"linux-cloud-tools-common","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-245.256"}]}],"bundled":29},{"source":"osv","ecosystem":"TuxCare:Ubuntu:18.04","package":"linux-cloud-tools-generic","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0.245.256"}]}],"bundled":29},{"source":"osv","ecosystem":"TuxCare:Ubuntu:18.04","package":"linux-cloud-tools-lowlatency","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0.245.256"}]}],"bundled":29},{"source":"osv","ecosystem":"TuxCare:Ubuntu:18.04","package":"linux-crashdump","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0.245.256"}]}],"bundled":29},{"source":"osv","ecosystem":"TuxCare:Ubuntu:18.04","package":"linux-doc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-245.256"}]}],"bundled":29},{"source":"osv","ecosystem":"TuxCare:Ubuntu:18.04","package":"linux-generic","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0.245.256"}]}],"bundled":29},{"source":"osv","ecosystem":"TuxCare:Ubuntu:18.04","package":"linux-headers-4.15.0-245-tuxcare.els33","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-245.256"}]}],"bundled":29},{"source":"osv","ecosystem":"TuxCare:Ubuntu:18.04","package":"linux-headers-4.15.0-245-tuxcare.els33-generic","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-245.256"}]}],"bundled":29},{"source":"osv","ecosystem":"TuxCare:Ubuntu:18.04","package":"linux-headers-4.15.0-245-tuxcare.els33-lowlatency","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-245.256"}]}],"bundled":29},{"source":"osv","ecosystem":"TuxCare:Ubuntu:18.04","package":"linux-headers-generic","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0.245.256"}]}],"bundled":29},{"source":"osv","ecosystem":"TuxCare:Ubuntu:18.04","package":"linux-headers-lowlatency","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0.245.256"}]}],"bundled":29},{"source":"osv","ecosystem":"TuxCare:Ubuntu:18.04","package":"linux-image-generic","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0.245.256"}]}],"bundled":29},{"source":"osv","ecosystem":"TuxCare:Ubuntu:18.04","package":"linux-image-lowlatency","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0.245.256"}]}],"bundled":29},{"source":"osv","ecosystem":"TuxCare:Ubuntu:18.04","package":"linux-image-unsigned-4.15.0-245-tuxcare.els33-generic","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-245.256"}]}],"bundled":29},{"source":"osv","ecosystem":"TuxCare:Ubuntu:18.04","package":"linux-image-unsigned-4.15.0-245-tuxcare.els33-lowlatency","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-245.256"}]}],"bundled":29},{"source":"osv","ecosystem":"TuxCare:Ubuntu:18.04","package":"linux-libc-dev","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-245.256"}]}],"bundled":29},{"source":"osv","ecosystem":"TuxCare:Ubuntu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ta.tuxcare.com/els_os/oraclelinux7els/CLSA-2025-1762244592.html","tags":["advisory"]},{"url":"https://errata.tuxcare.com/els_os/rhel7els/CLSA-2025-1762244848.html","tags":["advisory"]},{"url":"https://errata.tuxcare.com/els_os/centos7els/CLSA-2025-1762332910.html","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-48701","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-56658","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-38477","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2021-47342","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-47342","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-47342","tags":["report"]},{"url":"https://git.kernel.org/linus/61bb4a1c417e5b95d9edb4f887f131de32e419cb","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2021-47342","title":"ext4: fix possible UAF when remounting r/o a mmp-protected file system","description":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix possible UAF when remounting r/o a mmp-protected file system\n\nAfter commit 618f003199c6 (\"ext4: fix memory leak in\next4_fill_super\"), after the file system is remounted read-only, there\nis a race where the kmmpd thread can exit, causing sbi-\u003es_mmp_tsk to\npoint at freed memory, which the call to ext4_stop_mmpd() can trip\nover.\n\nFix this by only allowing kmmpd() to exit when it is stopped via\next4_stop_mmpd().\n\nBug-Report-Link: \u003c20210629143603.2166962-1-yebin10@huawei.com\u003e","status":"published","published":"2024-05-21T14:35:49.643Z","modified":"2026-05-23T15:19:46.44Z","updated_at":"2026-11-02T14:32:56.308189Z"}],"euvd":[{"id":"EUVD-2021-34347","description":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix possible UAF when remounting r/o a mmp-protected file system\n\nAfter commit 618f003199c6 (\"ext4: fix memory leak in\next4_fill_super\"), after the file system is remounted read-only, there\nis a race where the kmmpd thread can exit, causing sbi-\u003es_mmp_tsk to\npoint at freed memory, which the call to ext4_stop_mmpd() can trip\nover.\n\nFix this by only allowing kmmpd() to exit when it is stopped via\next4_stop_mmpd().\n\nBug-Report-Link: \u003c20210629143603.2166962-1-yebin10@huawei.com\u003e","status":"published","published":"2024-05-21T14:35:49Z","modified":"2026-05-23T15:19:46Z","updated_at":"2026-11-02T18:21:12.112235Z"}],"ghsa":[{"id":"GHSA-c5qq-qcr6-82vp","title":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix possible UAF when...","description":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix possible UAF when remounting r/o a mmp-protected file system\n\nAfter commit 618f003199c6 (\"ext4: fix memory leak in\next4_fill_super\"), after the file system is remounted read-only, there\nis a race where the kmmpd thread can exit, causing sbi-\u003es_mmp_tsk to\npoint at freed memory, which the call to ext4_stop_mmpd() can trip\nover.\n\nFix this by only allowing kmmpd() to exit when it is stopped via\next4_stop_mmpd().\n\nBug-Report-Link: \u003c20210629143603.2166962-1-yebin10@huawei.com\u003e","status":"published","published":"2024-05-21T15:31:43Z","modified":"2024-12-26T21:31:38Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:59:16.46237Z"}],"nvd":[{"id":"CVE-2021-47342","description":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix possible UAF when remounting r/o a mmp-protected file system\n\nAfter commit 618f003199c6 (\"ext4: fix memory leak in\next4_fill_super\"), after the file system is remounted read-only, there\nis a race where the kmmpd thread can exit, causing sbi-\u003es_mmp_tsk to\npoint at freed memory, which the call to ext4_stop_mmpd() can trip\nover.\n\nFix this by only allowing kmmpd() to exit when it is stopped via\next4_stop_mmpd().\n\nBug-Report-Link: \u003c20210629143603.2166962-1-yebin10@huawei.com\u003e","status":"published","published":"2024-05-21T15:15:20.923Z","modified":"2026-06-17T04:17:14.62Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:07:08.629518Z"}],"osv":[{"id":"CVE-2021-47342","description":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix possible UAF when remounting r/o a mmp-protected file system\n\nAfter commit 618f003199c6 (\"ext4: fix memory leak in\next4_fill_super\"), after the file system is remounted read-only, there\nis a race where the kmmpd thread can exit, causing sbi-\u003es_mmp_tsk to\npoint at freed memory, which the call to ext4_stop_mmpd() can trip\nover.\n\nFix this by only allowing kmmpd() to exit when it is stopped via\next4_stop_mmpd().\n\nBug-Report-Link: \u003c20210629143603.2166962-1-yebin10@huawei.com\u003e","status":"published","published":"2024-05-21T15:15:20.923Z","modified":"2026-03-15T22:43:10.952642Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:22.470367Z"},{"id":"DEBIAN-CVE-2021-47342","description":"In the Linux kernel, the following vulnerability has been resolved:  ext4: fix possible UAF when remounting r/o a mmp-protected file system  After commit 618f003199c6 (\"ext4: fix memory leak in ext4_fill_super\"), after the file system is remounted read-only, there is a race where the kmmpd thread can exit, causing sbi-\u003es_mmp_tsk to point at freed memory, which the call to ext4_stop_mmpd() can trip over.  Fix this by only allowing kmmpd() to exit when it is stopped via ext4_stop_mmpd().  Bug-Report-Link: \u003c20210629143603.2166962-1-yebin10@huawei.com\u003e","status":"published","published":"2024-05-21T15:15:20.923Z","modified":"2026-10-23T18:04:19.611243711Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:36.081807Z"},{"id":"UBUNTU-CVE-2021-47342","description":"In the Linux kernel, the following vulnerability has been resolved: ext4: fix possible UAF when remounting r/o a mmp-protected file system After commit 618f003199c6 (\"ext4: fix memory leak in ext4_fill_super\"), after the file system is remounted read-only, there is a race where the kmmpd thread can exit, causing sbi-\u003es_mmp_tsk to point at freed memory, which the call to ext4_stop_mmpd() can trip over. Fix this by only allowing kmmpd() to exit when it is stopped via ext4_stop_mmpd(). Bug-Report-Link: \u003c20210629143603.2166962-1-yebin10@huawei.com\u003e","status":"published","published":"2024-05-21T15:15:00Z","modified":"2026-10-23T10:32:34.307828742Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T16:53:48.688001Z"},{"id":"CLSA-2025-1742319747","title":"Fix of 29 CVEs","description":"   * CVE-url: https://ubuntu.com/security/CVE-2024-50180\n     - fbdev: sisfb: Fix strbuf array overflow\n   * CVE-url: https://ubuntu.com/security/CVE-2023-52522\n     - net: fix possible store tearing in neigh_periodic_work()\n   * CVE-url: https://ubuntu.com/security/CVE-2024-40911\n     - wifi: cfg80211: Lock wiphy in cfg80211_get_station\n   * CVE-url: https://ubuntu.com/security/CVE-2024-43863\n     - drm/vmwgfx: Fix a deadlock in dma buf fence polling\n   * CVE-url: https://ubuntu.com/security/CVE-2024-44931\n     - gpio: prevent potential speculation leaks in gpio_device_get_desc()\n   * CVE-url: https://ubuntu.com/security/CVE-2024-23848\n     - media: cec: cec-api: add locking in cec_release()\n     - media: cec: core: avoid recursive cec_claim_log_addrs\n   * CVE-url: https://ubuntu.com/security/CVE-2024-50229\n     - nilfs2: fix potential deadlock with newly created symlinks\n   * CVE-url: https://ubuntu.com/security/CVE-2024-50171\n     - net: systemport: fix potential memory leak in bcm_sysport_xmit()\n   * CVE-url: https://ubuntu.com/security/CVE-2024-50233\n     - staging: iio: frequency: ad9832: fix division by zero in\n       ad9832_calc_freqreg()\n   * CVE-url: https://ubuntu.com/security/CVE-2024-50134\n     - drm/vboxvideo: Replace fake VLA at end of vbva_mouse_pointer_shape with real\n       VLA\n   * CVE-url: https://ubuntu.com/security/CVE-2024-44938\n     - jfs: Fix shift-out-of-bounds in dbDiscardAG\n   * CVE-url: https://ubuntu.com/security/CVE-2024-50117\n     - drm/amd: Guard against bad data for ATIF ACPI method\n   * CVE-url: https://ubuntu.com/security/CVE-2024-49902\n     - jfs: check if leafidx greater than num leaves per dmap tree\n   * CVE-url: https://ubuntu.com/security/CVE-2023-52799\n     - jfs: fix array-index-out-of-bounds in dbFindLeaf\n   * CVE-url: https://ubuntu.com/security/CVE-2024-49966\n     - ocfs2: cancel dqi_sync_work before freeing oinfo\n   * CVE-url: https://ubuntu.com/security/CVE-2024-50267\n     - USB: serial: io_edgeport: fix use after free in debug printk\n   * CVE-url: https://ubuntu.com/security/CVE-2024-50230\n     - nilfs2: fix kernel bug due to missing clearing of checked flag\n   * CVE-url: https://ubuntu.com/security/CVE-2024-50302\n     - HID: core: zero-initialize the report buffer\n   * CVE-url: https://ubuntu.com/security/CVE-2024-50278\n     - dm cache: fix out-of-bounds access to the dirty bitset when resizing\n     - dm cache: fix potential out-of-bounds access on the first resume\n   * CVE-url: https://ubuntu.com/security/CVE-2024-50234\n     - wifi: iwlegacy: Clear stale interrupts before resuming device\n   * CVE-url: https://ubuntu.com/security/CVE-2024-50301\n     - security/keys: fix slab-out-of-bounds in key_task_permission\n   * CVE-url: https://ubuntu.com/security/CVE-2024-50143\n     - overflow: Add __must_check attribute to check_*() helpers\n     - compiler.h: drop fallback overflow checkers\n     - overflow: Allow mixed type arguments\n     - udf: fix uninit-value use in udf_get_fileshortad\n   * CVE-url: https://ubuntu.com/security/CVE-2024-53061\n     - media: s5p-jpeg: prevent buffer overflows\n   * CVE-url: https://ubuntu.com/security/CVE-2024-57798\n     - drm/dp-mst-helper: Remove hotplug callback\n     - drm/dp_mst: Remove huge conditional in drm_dp_mst_handle_up_req()\n     - drm/dp_mst: Refactor drm_dp_mst_handle_up_req()\n     - drm/dp_mst: Rename drm_dp_add_port and drm_dp_update_port\n     - drm/dp_mst: Handle UP requests asynchronously\n     - drm/dp_mst: Ensure mst_primary pointer is valid in\n       drm_dp_mst_handle_up_req()\n   * CVE-url: https://ubuntu.com/security/CVE-2023-52854\n     - padata: make padata_do_parallel find alternate callback CPU\n     - padata: allocate workqueue internally\n     - crypto: pcrypt - remove padata cpumask notifier\n     - padata, pcrypt: take CPU hotplug lock internally in padata_alloc_possible\n     - padata: use separate workqueues for parallel and serial work\n     - padata: unbind parallel jobs from specific CPUs\n     - workqueue: Make alloc/apply/free_workqueue_attrs() static\n     - workqueue: Remove GPF argument from alloc_workqueue_attrs()\n     - workqueue: unconfine alloc/apply/free_workqueue_attrs()\n     - crypto: pcrypt - Avoid deadlock by using per-instance padata queues\n     - crypto: aead - pass instance to crypto_grab_aead()\n     - crypto: pcrypt - simplify error handling in pcrypt_create_aead()\n     - padata: Fix refcnt handling in padata_free_shell()\n   * CVE-url: https://ubuntu.com/security/CVE-2024-53164\n     - net: sched: fix ordering of qlen adjustment\n   * CVE-url: https://ubuntu.com/security/CVE-2024-47809\n     - dlm: fix possible lkb_resource null dereference\n   * CVE-url: https://ubuntu.com/security/CVE-2021-47342\n     - ext4: fix memory leak in ext4_fill_super\n     - ext4: fix possible UAF when remounting r/o a mmp-protected file system\n   * CVE-url: https://ubuntu.com/security/CVE-2024-53179\n     - smb: client: fix use-after-free of signing key\n   * Miscellaneous upstream changes\n     - drm/amd/amdgpu: Fix GPR read from debugfs (v2)","status":"published","published":"2025-03-18T17:42:33Z","modified":"2026-06-04T10:03:21.432441887Z","updated_at":"2026-11-02T15:43:41.66212Z"},{"id":"CLSA-2025-1747430034","title":"Fix of 54 CVEs","description":"   * Bionic update: upstream stable patchset 2022-04-13 (LP: #1968932) // CVE-\n     url: https://ubuntu.com/security/CVE-2022-23041\n     - xen/gnttab: fix gnttab_end_foreign_access() without page specified\n   * Bionic update: upstream stable patchset 2023-01-20 (LP: #2003596) // CVE-\n     url: https://ubuntu.com/security/CVE-2022-49850\n     - nilfs2: fix deadlock in nilfs_count_free_blocks()\n   * CVE-url: https://ubuntu.com/security/CVE-2024-42305\n     - ext4: check dot and dotdot of dx_root before making dir indexed\n   * CVE-url: https://ubuntu.com/security/CVE-2024-53168\n     - sunrpc: fix one UAF issue caused by sunrpc kernel tcp socket\n   * CVE-url: https://ubuntu.com/security/CVE-2024-26915\n     - drm/amdgpu: Add check to prevent IH overflow\n     - drm/amdgpu: Reset IH OVERFLOW_CLEAR bit\n   * CVE-url: https://ubuntu.com/security/CVE-2024-56770\n     - net/sched: netem: account for backlog updates from child qdisc\n     - netem: Update sch-\u003eq.qlen before qdisc_tree_reduce_backlog()\n   * Bionic update: upstream stable patchset 2022-01-14 (LP: #1957957) // CVE-\n     url: https://ubuntu.com/security/CVE-2021-47587\n     - net: systemport: Add global locking for descriptor lifecycle\n   * Bionic update: upstream stable patchset 2021-06-01 (LP: #1930472) // CVE-\n     url: https://ubuntu.com/security/CVE-2021-46959\n     - spi: Fix use-after-free with devm_spi_alloc_*\n   * CVE-url: https://ubuntu.com/security/CVE-2024-26689\n     - ceph: prevent use-after-free in encode_cap_msg()\n   * CVE-url: https://ubuntu.com/security/CVE-2024-53066\n     - nfs: Fix KMSAN warning in decode_getfattr_attrs()\n   * CVE-url: https://ubuntu.com/security/CVE-2024-49944\n     - sctp: set sk_state back to CLOSED if autobind fails in sctp_listen_start\n   * CVE-url: https://ubuntu.com/security/CVE-2024-50237\n     - wifi: mac80211: do not pass a stopped vif to the driver in .get_txpower\n   * CVE-url: https://ubuntu.com/security/CVE-2024-46780\n     - nilfs2: protect references to superblock parameters exposed in sysfs\n   * CVE-url: https://ubuntu.com/security/CVE-2024-53063\n     - media: dvbdev: prevent the risk of out of memory access\n     - media: dvbdev: fix the logic when DVB_DYNAMIC_MINORS is not set\n   * CVE-url: https://ubuntu.com/security/CVE-2021-47150\n     - net: fec: fix the potential memory leak in fec_enet_init()\n   * CVE-url: https://ubuntu.com/security/CVE-2024-53140\n     - netlink: terminate outstanding dump on socket close\n   * CVE-url: https://ubuntu.com/security/CVE-2025-21971\n     - net_sched: Prevent creation of classes with TC_H_ROOT\n   * CVE-url: https://ubuntu.com/security/CVE-2023-52572\n     - cifs: Fix UAF in cifs_demultiplex_thread()\n   * CVE-url: https://ubuntu.com/security/CVE-2025-37785\n     - ext4: fix OOB read when checking dotdot dir\n   * Bionic update: upstream stable patchset 2021-07-14 (LP: #1936231) // CVE-\n     url: https://ubuntu.com/security/CVE-2021-47277\n     - kvm: avoid speculation-based attacks from out-of-range memslot accesses\n   * CVE-url: https://ubuntu.com/security/CVE-2022-49740\n     - wifi: brcmfmac: Check the count value of channel spec to prevent out-of-\n       bounds reads\n   * Bionic update: upstream stable patchset 2022-07-25 (LP: #1982782) // CVE-\n     url: https://ubuntu.com/security/CVE-2022-49404\n     - RDMA/hfi1: Fix potential integer multiplication overflow errors\n   * Bionic update: upstream stable patchset 2023-03-03 (LP: #2009237) // CVE-\n     url: https://ubuntu.com/security/CVE-2022-49757\n     - EDAC/highbank: Fix memory leak in highbank_mc_probe()\n   * Bionic update: upstream stable patchset 2022-07-25 (LP: #1982782) // CVE-\n     url: https://ubuntu.com/security/CVE-2022-49395\n     - um: Fix out-of-bounds read in LDT setup\n   * CVE-url: https://ubuntu.com/security/CVE-2022-49738\n     - f2fs: fix to do sanity check on summary info\n     - f2fs: should put a page when checking the summary info\n     - f2fs: fix to do sanity check on i_extra_isize in is_alive()\n   * CVE-url: https://ubuntu.com/security/\n     - ipv6: Define dscp_t and stop taking ECN bits into account in fib6-rules\n   * CVE-url: https://ubuntu.com/security/CVE-2025-21891\n     - ipvlan: ensure network headers are in skb linear part\n   * CVE-url: https://ubuntu.com/security/CVE-2025-21969\n     - Bluetooth: L2CAP: Fix slab-use-after-free Read in l2cap_send_cmd\n   * CVE-url: https://ubuntu.com/security/CVE-2025-21957\n     - scsi: qla1280: Fix kernel oops when debug level \u003e 2\n   * CVE-url: https://ubuntu.com/security/CVE-2025-21948\n     - HID: appleir: Fix potential NULL dereference at raw event handle\n   * Bionic update: upstream stable patchset 2023-04-05 (LP: #2015399) // CVE-\n     url: https://ubuntu.com/security/CVE-2023-52989\n     - firewire: fix memory leak for payload of request subaction to IEC 61883-1\n       FCP region\n   * Bionic update: upstream stable patchset 2023-04-05 (LP: #2015399) // CVE-\n     url: https://ubuntu.com/security/CVE-2023-52932\n     - mm/swapfile: add cond_resched() in get_swap_pages()\n   * Bionic update: upstream stable patchset 2023-03-03 (LP: #2009237) // CVE-\n     url: https://ubuntu.com/security/CVE-2023-53015\n     - HID: betop: check shape of output reports\n   * Bionic update: upstream stable patchset 2023-03-03 (LP: #2009237) // CVE-\n     url: https://ubuntu.com/security/CVE-2023-52993\n     - x86/i8259: Mark legacy PIC interrupts with IRQ_LEVEL\n   * CVE-url: https://ubuntu.com/security/CVE-2025-21912\n     - gpio: rcar: Use raw_spinlock to protect register access\n   * CVE-url: https://ubuntu.com/security/CVE-2025-21922\n     - ppp: Fix KMSAN uninit-value warning with bpf\n   * CVE-url: https://ubuntu.com/security/CVE-2025-21959\n     - netfilter: nf_conncount: Fully initialize struct nf_conncount_tuple in\n       insert_tree()\n   * Bionic update: upstream stable patchset 2023-04-05 (LP: #2015399) // CVE-\n     url: https://ubuntu.com/security/CVE-2023-52988\n     - ALSA: hda/via: Avoid potential array out-of-bound in add_secret_dac_path()\n   * CVE-url: https://ubuntu.com/security/CVE-2025-21996\n     - drm/radeon: fix uninitialized size issue in radeon_vce_cs_parse()\n   * CVE-url: https://ubuntu.com/security/CVE-2025-21917\n     - usb: renesas_usbhs: Flush the notify_hotplug_work\n   * CVE-url: https://ubuntu.com/security/CVE-2023-53001\n     - drm/drm_vma_manager: Add drm_vma_node_allow_once()\n   * CVE-url: https://ubuntu.com/security/CVE-2025-21920\n     - vlan: enforce underlying device type\n   * CVE-url: https://ubuntu.com/security/CVE-2025-21904\n     - caif_virtio: fix wrong pointer check in cfv_probe()\n   * Bionic update: upstream stable patchset 2021-06-23 (LP: #1933375) // CVE-\n     url: https://ubuntu.com/security/CVE-2021-47320\n     - net: caif: added cfserl_release function\n     - net: caif: add proper error handling\n     - net: caif: fix memory leak in caif_device_notify\n   * CVE-url: https://ubuntu.com/security/CVE-2021-47342\n     - ext4: fix memory leak in ext4_fill_super\n     - ext4: fix timer use-after-free on failed mount\n   * Bionic update: upstream stable patchset 2021-08-03 (LP: #1938824) // CVE-\n     url: https://ubuntu.com/security/CVE-2021-47320\n     - nfs: fix acl memory leak of posix_acl_create()\n   * Bionic update: upstream stable patchset 2022-01-14 (LP: #1957957) // CVE-\n     url: https://ubuntu.com/security/CVE-2021-47602\n     - mac80211: track only QoS data frames for admission control\n   * CVE-url: https://ubuntu.com/security/CVE-2021-47328\n     - scsi: iscsi: Fix conn use after free during resets\n   * CVE-url: https://ubuntu.com/security/CVE-2025-21702\n     - pfifo_tail_enqueue: Drop new packet when sch-\u003elimit == 0\n   * CVE-url: https://ubuntu.com/security/CVE-2024-56658\n     - net: defer final 'struct net' free in netns dismantle\n   * CVE-url: https://ubuntu.com/security/CVE-2024-50265\n     - ocfs2: remove entry once instead of null-ptr-dereference in\n       ocfs2_xa_remove()\n   * CVE-url: https://ubuntu.com/security/CVE-2024-46826\n     - ELF: fix kernel.randomize_va_space double read\n   * CVE-url: https://ubuntu.com/security/CVE-2025-21700\n     - net: sched: Disallow replacing of child qdisc from one parent to another\n   * CVE-url: https://ubuntu.com/security/CVE-2024-50167\n     - be2net: fix potential memory leak in be_xmit()\n   * CVE-url: https://ubuntu.com/security/CVE-2024-49952\n     - netfilter: nf_tables: prevent nf_skb_duplicated corruption\n   * CVE-url: https://ubuntu.com/security/CVE-2024-49948\n     - net: add more sanity checks to qdisc_pkt_len_init()","status":"published","published":"2025-05-16T21:13:58Z","modified":"2026-06-04T10:03:23.925464906Z","updated_at":"2026-11-02T15:43:41.66212Z"},{"id":"CLSA-2025-1762244592","title":"kernel: Fix of 5 CVEs","description":"- ext4: fix possible UAF when remounting r/o a mmp-protected file system {CVE-2021-47342}\n- ext4: fix memory leak in ext4_fill_super\n- net: defer final 'struct net' free in netns dismantle {CVE-2024-56658}\n- net/sched: sch_qfq: Fix race condition on qfq_aggregate {CVE-2025-38477}\n- ALSA: usb-audio: Fix an out-of-bounds bug in __snd_usb_parse_audio_interface() {CVE-2022-48701}\n- fix: virtio-net: Add validation for used length {CVE-2021-47352}","status":"published","published":"2025-11-05T17:35:07Z","modified":"2026-10-21T10:48:12.353775629Z","updated_at":"2026-11-02T15:43:42.427288Z"},{"id":"CLSA-2025-1762244848","title":"kernel: Fix of 5 CVEs","description":"- ext4: fix possible UAF when remounting r/o a mmp-protected file system {CVE-2021-47342}\n- ext4: fix memory leak in ext4_fill_super\n- net: defer final 'struct net' free in netns dismantle {CVE-2024-56658}\n- net/sched: sch_qfq: Fix race condition on qfq_aggregate {CVE-2025-38477}\n- ALSA: usb-audio: Fix an out-of-bounds bug in __snd_usb_parse_audio_interface() {CVE-2022-48701}\n- fix: virtio-net: Add validation for used length {CVE-2021-47352}","status":"published","published":"2025-11-04T08:27:32Z","modified":"2026-10-21T10:48:13.82078609Z","updated_at":"2026-11-02T15:43:42.427288Z"},{"id":"CLSA-2025-1762332910","title":"kernel: Fix of 4 CVEs","description":"- ext4: fix possible UAF when remounting r/o a mmp-protected file system {CVE-2021-47342}\n- ext4: fix memory leak in ext4_fill_super\n- net: defer final 'struct net' free in netns dismantle {CVE-2024-56658}\n- net/sched: sch_qfq: Fix race condition on qfq_aggregate {CVE-2025-38477}\n- ALSA: usb-audio: Fix an out-of-bounds bug in __snd_usb_parse_audio_interface() {CVE-2022-48701}\n- fix: virtio-net: Add validation for used length {CVE-2021-47352}","status":"published","published":"2026-10-21T08:48:42Z","modified":"2026-10-26T09:31:41.287884246Z","updated_at":"2026-11-02T15:43:42.427288Z"}]}}