{"id":"CVE-2021-41073","aliases":["AZL-6596","BELL-CVE-2021-41073","DEBIAN-CVE-2021-41073","DSA-4978-1","EUVD-2021-28224","GHSA-5cqf-vv6j-6f4g","MGASA-2021-0459","MGASA-2021-0460","UBUNTU-CVE-2021-41073","USN-5092-1","USN-5092-2","USN-5096-1","USN-5106-1"],"status":"published","title":"loop_rw_iter in fs/io_uring.c in the Linux kernel through 5.14.6 allows local users to gain...","description":"loop_rw_iter in fs/io_uring.c in the Linux kernel 5.10 through 5.14.6 allows local users to gain privileges by using IORING_OP_PROVIDE_BUFFERS to trigger a free of a kernel buffer, as demonstrated by using /proc/\u003cpid\u003e/maps for exploitation.","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":"2026-11-12","score":0.01774,"percentile":0.78511,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-269","CWE-763"],"published":"2021-09-19T16:02:30Z","modified":"2026-10-23T18:03:28Z","exploits":[{"source":"pocgithub","id":"chompie1337/Linux_LPE_io_uring_CVE-2021-41073","title":"chompie1337/Linux_LPE_io_uring_CVE-2021-41073","date":"2022-03-02","url":"https://github.com/chompie1337/Linux_LPE_io_uring_CVE-2021-41073"},{"source":"pocgithub","id":"WhatsWrongAndWhy/CVE-2021-41073","title":"WhatsWrongAndWhy/CVE-2021-41073","date":"2026-07-21","url":"https://github.com/WhatsWrongAndWhy/CVE-2021-41073"}],"fixes":[{"ecosystem":"Azure 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List","Third Party Advisory","advisory","report"]},{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=16c8d2df7ec0eed31b7d3b61cb13206a7fb930cc","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory","fix","report"]},{"url":"https://www.debian.org/security/2021/dsa-4978","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred","Third Party Advisory","advisory"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PAP4TXEZ7J4EZQMQW5SIJMWXG7WZT3F7/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J7KSMIOQ4377CVTHMWNGNCWHMCRFRP2T/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"https://security.netapp.com/advisory/ntap-20211014-0003/","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2022/06/04/4","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-41073","tags":["web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/J7KSMIOQ4377CVTHMWNGNCWHMCRFRP2T/"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PAP4TXEZ7J4EZQMQW5SIJMWXG7WZT3F7/"},{"url":"https://github.com/advisories/GHSA-5cqf-vv6j-6f4g"},{"url":"https://docs.bell-sw.com/security/cves/CVE-2021-41073","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2021-41073","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2021-0459.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=29507","tags":["report"]},{"url":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.63","tags":["web"]},{"url":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.64","tags":["web"]},{"url":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.65","tags":["web"]},{"url":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.66","tags":["web"]},{"url":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.67","tags":["web"]},{"url":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.68","tags":["web"]},{"url":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.69","tags":["web"]},{"url":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.70","tags":["web"]},{"url":"https://advisories.mageia.org/MGASA-2021-0460.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=29508","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-41073","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-5092-1","tags":["advisory"]},{"url":"https://ubuntu.com/security/notices/USN-5092-2","tags":["advisory"]},{"url":"https://ubuntu.com/security/notices/USN-5096-1","tags":["advisory"]},{"url":"https://ubuntu.com/security/notices/USN-5106-1","tags":["advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-41073","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-3679","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-33624","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-34556","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-35477","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-37159","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-37576","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-38160","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-38199","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-38201","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-38204","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-38205","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-3612","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-3732","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-38166","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-38202","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-38203","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-40490","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2020-26541","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-22543","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2021-41073","description":"loop_rw_iter in fs/io_uring.c in the Linux kernel 5.10 through 5.14.6 allows local users to gain privileges by using IORING_OP_PROVIDE_BUFFERS to trigger a free of a kernel buffer, as demonstrated by using /proc/\u003cpid\u003e/maps for exploitation.","status":"published","published":"2021-09-19T16:02:30Z","modified":"2024-08-04T02:59:31Z","updated_at":"2026-11-02T14:32:59.430294Z"}],"euvd":[{"id":"EUVD-2021-28224","description":"loop_rw_iter in fs/io_uring.c in the Linux kernel 5.10 through 5.14.6 allows local users to gain privileges by using IORING_OP_PROVIDE_BUFFERS to trigger a free of a kernel buffer, as demonstrated by using /proc/\u003cpid\u003e/maps for exploitation.","status":"published","published":"2021-09-19T16:02:30Z","modified":"2024-08-04T02:59:31Z","updated_at":"2026-11-03T03:24:18.784846Z"}],"ghsa":[{"id":"GHSA-5cqf-vv6j-6f4g","title":"loop_rw_iter in fs/io_uring.c in the Linux kernel through 5.14.6 allows local users to gain...","description":"loop_rw_iter in fs/io_uring.c in the Linux kernel through 5.14.6 allows local users to gain privileges by using IORING_OP_PROVIDE_BUFFERS to trigger a free of a kernel buffer, as demonstrated by using /proc/\u003cpid\u003e/maps for exploitation.","status":"published","published":"2022-05-24T19:15:01Z","modified":"2023-01-30T05:05:50Z","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-269"],"updated_at":"2026-11-02T14:47:22.035472Z"}],"nvd":[{"id":"CVE-2021-41073","description":"loop_rw_iter in fs/io_uring.c in the Linux kernel 5.10 through 5.14.6 allows local users to gain privileges by using IORING_OP_PROVIDE_BUFFERS to trigger a free of a kernel buffer, as demonstrated by using /proc/\u003cpid\u003e/maps for exploitation.","status":"published","published":"2021-09-19T17:15:07.227Z","modified":"2026-06-17T04:07:49.24Z","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"},{"version":"2.0","score":7.2,"vector":"AV:L/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-763"],"updated_at":"2026-11-02T14:06:58.933037Z"}],"osv":[{"id":"AZL-6596","title":"CVE-2021-41073 affecting package kernel for versions less than 5.10.78.1-1","description":"loop_rw_iter in fs/io_uring.c in the Linux kernel 5.10 through 5.14.6 allows local users to gain privileges by using IORING_OP_PROVIDE_BUFFERS to trigger a free of a kernel buffer, as demonstrated by using /proc/\u003cpid\u003e/maps for exploitation.","status":"published","published":"2021-09-19T17:15:07Z","modified":"2026-04-21T04:37:44.480962Z","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":"2026-11-02T15:28:08.354547Z"},{"id":"BELL-CVE-2021-41073","title":"CVE-2021-41073 does not affect BellSoft software","status":"withdrawn","published":"2021-09-19T17:15:00Z","modified":"2026-01-26T09:47:21.625774Z","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":"2026-11-02T15:28:16.5265Z"},{"id":"CVE-2021-41073","description":"loop_rw_iter in fs/io_uring.c in the Linux kernel 5.10 through 5.14.6 allows local users to gain privileges by using IORING_OP_PROVIDE_BUFFERS to trigger a free of a kernel buffer, as demonstrated by using /proc/\u003cpid\u003e/maps for exploitation.","status":"published","published":"2021-09-19T17:15:07.227Z","modified":"2026-04-16T04:41:59.184377848Z","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":"2026-11-02T15:44:21.249056Z"},{"id":"DEBIAN-CVE-2021-41073","description":"loop_rw_iter in fs/io_uring.c in the Linux kernel 5.10 through 5.14.6 allows local users to gain privileges by using IORING_OP_PROVIDE_BUFFERS to trigger a free of a kernel buffer, as demonstrated by using /proc/\u003cpid\u003e/maps for exploitation.","status":"published","published":"2021-09-19T17:15:07.227Z","modified":"2026-10-23T18:03:28.012569613Z","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":"2026-11-02T15:45:35.521549Z"},{"id":"UBUNTU-CVE-2021-41073","description":"loop_rw_iter in fs/io_uring.c in the Linux kernel 5.10 through 5.14.6 allows local users to gain privileges by using IORING_OP_PROVIDE_BUFFERS to trigger a free of a kernel buffer, as demonstrated by using /proc/\u003cpid\u003e/maps for exploitation.","status":"published","published":"2021-09-19T17:15:00Z","modified":"2026-02-04T02:15:43.34155Z","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":"2026-11-02T15:54:29.220315Z"},{"id":"DSA-4978-1","title":"linux - security update","status":"published","published":"2021-09-25T00:00:00Z","modified":"2026-03-09T02:11:22.124773Z","updated_at":"2026-11-02T15:46:17.19998Z"},{"id":"MGASA-2021-0459","title":"Updated kernel packages fix security vulnerabilities","description":"This kernel update is based on upstream 5.10.70 and fixes at least the\nfollowing security issues:\n\nUse-after-free vulnerability in the Linux kernel exploitable by a local\nattacker due to reuse of a DCCP socket with an attached dccps_hc_tx_ccid\nobject as a listener after being released (CVE-2020-16119).\n\noop_rw_iter in fs/io_uring.c in the Linux kernel 5.10 through 5.14.6 allows\nlocal users to gain privileges by using IORING_OP_PROVIDE_BUFFERS to trigger\na free of a kernel buffer, as demonstrated by using /proc/\u003cpid\u003e/maps for\nexploitation (CVE-2021-41073).\n\nFor other upstream fixes, see the referenced changelogs. \n","status":"published","published":"2021-10-04T16:42:18Z","modified":"2026-04-16T04:44:28.645875704Z","updated_at":"2026-11-02T15:49:41.849028Z"},{"id":"MGASA-2021-0460","title":"Updated kernel-linus packages fix security vulnerabilities","description":"This kernel-linus update is based on upstream 5.10.70 and fixes at least\nthe following security issues:\n\nUse-after-free vulnerability in the Linux kernel exploitable by a local\nattacker due to reuse of a DCCP socket with an attached dccps_hc_tx_ccid\nobject as a listener after being released (CVE-2020-16119).\n\nA race condition was discovered in ext4_write_inline_data_end in\nfs/ext4/inline.c in the ext4 subsystem in the Linux kernel through 5.13.13\n(CVE-2021-40490).\n\noop_rw_iter in fs/io_uring.c in the Linux kernel 5.10 through 5.14.6 allows\nlocal users to gain privileges by using IORING_OP_PROVIDE_BUFFERS to trigger\na free of a kernel buffer, as demonstrated by using /proc/\u003cpid\u003e/maps for\nexploitation (CVE-2021-41073).\n\nFor other upstream fixes, see the referenced changelogs.\n","status":"published","published":"2021-10-04T16:42:18Z","modified":"2026-04-16T04:41:13.995100319Z","updated_at":"2026-11-02T15:49:41.849028Z"},{"id":"USN-5092-1","title":"linux, linux-aws, linux-aws-5.11, linux-gcp, linux-kvm, linux-oracle, linux-raspi vulnerabilities","description":"Valentina Palmiotti discovered that the io_uring subsystem in the Linux\nkernel could be coerced to free adjacent memory. A local attacker could use\nthis to execute arbitrary code. (CVE-2021-41073)\n\nOfek Kirzner, Adam Morrison, Benedict Schlueter, and Piotr Krysiuk\ndiscovered that the BPF verifier in the Linux kernel missed possible\nmispredicted branches due to type confusion, allowing a side-channel\nattack. An attacker could use this to expose sensitive information.\n(CVE-2021-33624)\n\nBenedict Schlueter discovered that the BPF subsystem in the Linux kernel\ndid not properly protect against Speculative Store Bypass (SSB) side-\nchannel attacks in some situations. A local attacker could possibly use\nthis to expose sensitive information. (CVE-2021-34556)\n\nPiotr Krysiuk discovered that the BPF subsystem in the Linux kernel did not\nproperly protect against Speculative Store Bypass (SSB) side-channel\nattacks in some situations. A local attacker could possibly use this to\nexpose sensitive information. (CVE-2021-35477)\n\nIt was discovered that the tracing subsystem in the Linux kernel did not\nproperly keep track of per-cpu ring buffer state. A privileged attacker\ncould use this to cause a denial of service. (CVE-2021-3679)\n\nIt was discovered that the Option USB High Speed Mobile device driver in\nthe Linux kernel did not properly handle error conditions. A physically\nproximate attacker could use this to cause a denial of service (system\ncrash) or possibly execute arbitrary code. (CVE-2021-37159)\n\nAlexey Kardashevskiy discovered that the KVM implementation for PowerPC\nsystems in the Linux kernel did not properly validate RTAS arguments in\nsome situations. An attacker in a guest vm could use this to cause a denial\nof service (host OS crash) or possibly execute arbitrary code.\n(CVE-2021-37576)\n\nIt was discovered that the Virtio console implementation in the Linux\nkernel did not properly validate input lengths in some situations. A local\nattacker could possibly use this to cause a denial of service (system\ncrash). (CVE-2021-38160)\n\nMichael Wakabayashi discovered that the NFSv4 client implementation in the\nLinux kernel did not properly order connection setup operations. An\nattacker controlling a remote NFS server could use this to cause a denial\nof service on the client. (CVE-2021-38199)\n\nIt was discovered that the Sun RPC implementation in the Linux kernel\ncontained an out-of-bounds access error. A remote attacker could possibly\nuse this to cause a denial of service (system crash). (CVE-2021-38201)\n\nIt was discovered that the MAX-3421 host USB device driver in the Linux\nkernel did not properly handle device removal events. A physically\nproximate attacker could use this to cause a denial of service (system\ncrash). (CVE-2021-38204)\n\nIt was discovered that the Xilinx 10/100 Ethernet Lite device driver in the\nLinux kernel could report pointer addresses in some situations. An attacker\ncould use this information to ease the exploitation of another\nvulnerability. (CVE-2021-38205)\n","status":"published","published":"2021-09-28T04:09:07Z","modified":"2026-06-03T14:04:08.244269663Z","updated_at":"2026-11-02T16:58:15.683829Z"},{"id":"USN-5092-2","title":"linux-hwe-5.11, linux-azure, linux-azure-5.11, linux-oracle-5.11 vulnerabilities","description":"Valentina Palmiotti discovered that the io_uring subsystem in the Linux\nkernel could be coerced to free adjacent memory. A local attacker could use\nthis to execute arbitrary code. (CVE-2021-41073)\n\nOfek Kirzner, Adam Morrison, Benedict Schlueter, and Piotr Krysiuk\ndiscovered that the BPF verifier in the Linux kernel missed possible\nmispredicted branches due to type confusion, allowing a side-channel\nattack. An attacker could use this to expose sensitive information.\n(CVE-2021-33624)\n\nBenedict Schlueter discovered that the BPF subsystem in the Linux kernel\ndid not properly protect against Speculative Store Bypass (SSB) side-\nchannel attacks in some situations. A local attacker could possibly use\nthis to expose sensitive information. (CVE-2021-34556)\n\nPiotr Krysiuk discovered that the BPF subsystem in the Linux kernel did not\nproperly protect against Speculative Store Bypass (SSB) side-channel\nattacks in some situations. A local attacker could possibly use this to\nexpose sensitive information. (CVE-2021-35477)\n\nIt was discovered that the tracing subsystem in the Linux kernel did not\nproperly keep track of per-cpu ring buffer state. A privileged attacker\ncould use this to cause a denial of service. (CVE-2021-3679)\n\nIt was discovered that the Option USB High Speed Mobile device driver in\nthe Linux kernel did not properly handle error conditions. A physically\nproximate attacker could use this to cause a denial of service (system\ncrash) or possibly execute arbitrary code. (CVE-2021-37159)\n\nAlexey Kardashevskiy discovered that the KVM implementation for PowerPC\nsystems in the Linux kernel did not properly validate RTAS arguments in\nsome situations. An attacker in a guest vm could use this to cause a denial\nof service (host OS crash) or possibly execute arbitrary code.\n(CVE-2021-37576)\n\nIt was discovered that the Virtio console implementation in the Linux\nkernel did not properly validate input lengths in some situations. A local\nattacker could possibly use this to cause a denial of service (system\ncrash). (CVE-2021-38160)\n\nMichael Wakabayashi discovered that the NFSv4 client implementation in the\nLinux kernel did not properly order connection setup operations. An\nattacker controlling a remote NFS server could use this to cause a denial\nof service on the client. (CVE-2021-38199)\n\nIt was discovered that the Sun RPC implementation in the Linux kernel\ncontained an out-of-bounds access error. A remote attacker could possibly\nuse this to cause a denial of service (system crash). (CVE-2021-38201)\n\nIt was discovered that the MAX-3421 host USB device driver in the Linux\nkernel did not properly handle device removal events. A physically\nproximate attacker could use this to cause a denial of service (system\ncrash). (CVE-2021-38204)\n\nIt was discovered that the Xilinx 10/100 Ethernet Lite device driver in the\nLinux kernel could report pointer addresses in some situations. An attacker\ncould use this information to ease the exploitation of another\nvulnerability. (CVE-2021-38205)\n","status":"published","published":"2021-09-29T09:02:30Z","modified":"2026-06-03T14:03:45.590294568Z","updated_at":"2026-11-02T16:58:15.683829Z"},{"id":"USN-5096-1","title":"linux-oem-5.13 vulnerabilities","description":"Valentina Palmiotti discovered that the io_uring subsystem in the Linux\nkernel could be coerced to free adjacent memory. A local attacker could use\nthis to execute arbitrary code. (CVE-2021-41073)\n\nBenedict Schlueter discovered that the BPF subsystem in the Linux kernel\ndid not properly protect against Speculative Store Bypass (SSB) side-\nchannel attacks in some situations. A local attacker could possibly use\nthis to expose sensitive information. (CVE-2021-34556)\n\nPiotr Krysiuk discovered that the BPF subsystem in the Linux kernel did not\nproperly protect against Speculative Store Bypass (SSB) side-channel\nattacks in some situations. A local attacker could possibly use this to\nexpose sensitive information. (CVE-2021-35477)\n\nMurray McAllister discovered that the joystick device interface in the\nLinux kernel did not properly validate data passed via an ioctl(). A local\nattacker could use this to cause a denial of service (system crash) or\npossibly execute arbitrary code on systems with a joystick device\nregistered. (CVE-2021-3612)\n\nIt was discovered that the tracing subsystem in the Linux kernel did not\nproperly keep track of per-cpu ring buffer state. A privileged attacker\ncould use this to cause a denial of service. (CVE-2021-3679)\n\nIt was discovered that the Option USB High Speed Mobile device driver in\nthe Linux kernel did not properly handle error conditions. A physically\nproximate attacker could use this to cause a denial of service (system\ncrash) or possibly execute arbitrary code. (CVE-2021-37159)\n\nAlois Wohlschlager discovered that the overlay file system in the Linux\nkernel did not restrict private clones in some situations. An attacker\ncould use this to expose sensitive information. (CVE-2021-3732)\n\nIt was discovered that the Virtio console implementation in the Linux\nkernel did not properly validate input lengths in some situations. A local\nattacker could possibly use this to cause a denial of service (system\ncrash). (CVE-2021-38160)\n\nIt was discovered that the BPF subsystem in the Linux kernel contained an\ninteger overflow in its hash table implementation. A local attacker could\nuse this to cause a denial of service (system crash) or possibly execute\narbitrary code. (CVE-2021-38166)\n\nMichael Wakabayashi discovered that the NFSv4 client implementation in the\nLinux kernel did not properly order connection setup operations. An\nattacker controlling a remote NFS server could use this to cause a denial\nof service on the client. (CVE-2021-38199)\n\nIt was discovered that the Sun RPC implementation in the Linux kernel\ncontained an out-of-bounds access error. A remote attacker could possibly\nuse this to cause a denial of service (system crash). (CVE-2021-38201)\n\nIt was discovered that the NFS server implementation in the Linux kernel\ncontained an out-of-bounds read when the trace even framework is being used\nfor nfsd. A remote attacker could possibly use this to cause a denial of\nservice (system crash). (CVE-2021-38202)\n\nNaohiro Aota discovered that the btrfs file system in the Linux kernel\ncontained a race condition in situations that triggered allocations of new\nsystem chunks. A local attacker could possibly use this to cause a denial\nof service (deadlock). (CVE-2021-38203)\n\nIt was discovered that the MAX-3421 host USB device driver in the Linux\nkernel did not properly handle device removal events. A physically\nproximate attacker could use this to cause a denial of service (system\ncrash). (CVE-2021-38204)\n\nIt was discovered that the Xilinx 10/100 Ethernet Lite device driver in the\nLinux kernel could report pointer addresses in some situations. An attacker\ncould use this information to ease the exploitation of another\nvulnerability. (CVE-2021-38205)\n\nIt was discovered that the ext4 file system in the Linux kernel contained a\nrace condition when writing xattrs to an inode. A local attacker could use\nthis to cause a denial of service or possibly gain administrative\nprivileges. (CVE-2021-40490)\n","status":"published","published":"2021-09-29T22:27:08Z","modified":"2026-09-09T14:32:44.012948981Z","updated_at":"2026-11-02T16:58:15.683829Z"},{"id":"USN-5106-1","title":"linux-oem-5.10 vulnerabilities","description":"Valentina Palmiotti discovered that the io_uring subsystem in the Linux\nkernel could be coerced to free adjacent memory. A local attacker could use\nthis to execute arbitrary code. (CVE-2021-41073)\n\nIt was discovered that the Linux kernel did not properly enforce certain\ntypes of entries in the Secure Boot Forbidden Signature Database (aka dbx)\nprotection mechanism. An attacker could use this to bypass UEFI Secure Boot\nrestrictions. (CVE-2020-26541)\n\nIt was discovered that the KVM hypervisor implementation in the Linux\nkernel did not properly perform reference counting in some situations,\nleading to a use-after-free vulnerability. An attacker who could start and\ncontrol a VM could possibly use this to expose sensitive information or\nexecute arbitrary code. (CVE-2021-22543)\n\nMurray McAllister discovered that the joystick device interface in the\nLinux kernel did not properly validate data passed via an ioctl(). A local\nattacker could use this to cause a denial of service (system crash) or\npossibly execute arbitrary code on systems with a joystick device\nregistered. (CVE-2021-3612)\n\nIt was discovered that the Virtio console implementation in the Linux\nkernel did not properly validate input lengths in some situations. A local\nattacker could possibly use this to cause a denial of service (system\ncrash). (CVE-2021-38160)\n\nMichael Wakabayashi discovered that the NFSv4 client implementation in the\nLinux kernel did not properly order connection setup operations. An\nattacker controlling a remote NFS server could use this to cause a denial\nof service on the client. (CVE-2021-38199)\n\n","status":"published","published":"2021-10-06T19:09:39Z","modified":"2026-06-03T14:04:06.325620087Z","updated_at":"2026-11-02T16:58:15.683829Z"}]}}