{"id":"CVE-2024-54031","summary":"netfilter: nft_set_hash: unaligned atomic read on struct nft_set_ext","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nft_set_hash: unaligned atomic read on struct nft_set_ext\n\nAccess to genmask field in struct nft_set_ext results in unaligned\natomic read:\n\n[   72.130109] Unable to handle kernel paging request at virtual address ffff0000c2bb708c\n[   72.131036] Mem abort info:\n[   72.131213]   ESR = 0x0000000096000021\n[   72.131446]   EC = 0x25: DABT (current EL), IL = 32 bits\n[   72.132209]   SET = 0, FnV = 0\n[   72.133216]   EA = 0, S1PTW = 0\n[   72.134080]   FSC = 0x21: alignment fault\n[   72.135593] Data abort info:\n[   72.137194]   ISV = 0, ISS = 0x00000021, ISS2 = 0x00000000\n[   72.142351]   CM = 0, WnR = 0, TnD = 0, TagAccess = 0\n[   72.145989]   GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0\n[   72.150115] swapper pgtable: 4k pages, 48-bit VAs, pgdp=0000000237d27000\n[   72.154893] [ffff0000c2bb708c] pgd=0000000000000000, p4d=180000023ffff403, pud=180000023f84b403, pmd=180000023f835403,\n+pte=0068000102bb7707\n[   72.163021] Internal error: Oops: 0000000096000021 [#1] SMP\n[...]\n[   72.170041] CPU: 7 UID: 0 PID: 54 Comm: kworker/7:0 Tainted: G            E      6.13.0-rc3+ #2\n[   72.170509] Tainted: [E]=UNSIGNED_MODULE\n[   72.170720] Hardware name: QEMU QEMU Virtual Machine, BIOS edk2-stable202302-for-qemu 03/01/2023\n[   72.171192] Workqueue: events_power_efficient nft_rhash_gc [nf_tables]\n[   72.171552] pstate: 21400005 (nzCv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--)\n[   72.171915] pc : nft_rhash_gc+0x200/0x2d8 [nf_tables]\n[   72.172166] lr : nft_rhash_gc+0x128/0x2d8 [nf_tables]\n[   72.172546] sp : ffff800081f2bce0\n[   72.172724] x29: ffff800081f2bd40 x28: ffff0000c2bb708c x27: 0000000000000038\n[   72.173078] x26: ffff0000c6780ef0 x25: ffff0000c643df00 x24: ffff0000c6778f78\n[   72.173431] x23: 000000000000001a x22: ffff0000c4b1f000 x21: ffff0000c6780f78\n[   72.173782] x20: ffff0000c2bb70dc x19: ffff0000c2bb7080 x18: 0000000000000000\n[   72.174135] x17: ffff0000c0a4e1c0 x16: 0000000000003000 x15: 0000ac26d173b978\n[   72.174485] x14: ffffffffffffffff x13: 0000000000000030 x12: ffff0000c6780ef0\n[   72.174841] x11: 0000000000000000 x10: ffff800081f2bcf8 x9 : ffff0000c3000000\n[   72.175193] x8 : 00000000000004be x7 : 0000000000000000 x6 : 0000000000000000\n[   72.175544] x5 : 0000000000000040 x4 : ffff0000c3000010 x3 : 0000000000000000\n[   72.175871] x2 : 0000000000003a98 x1 : ffff0000c2bb708c x0 : 0000000000000004\n[   72.176207] Call trace:\n[   72.176316]  nft_rhash_gc+0x200/0x2d8 [nf_tables] (P)\n[   72.176653]  process_one_work+0x178/0x3d0\n[   72.176831]  worker_thread+0x200/0x3f0\n[   72.176995]  kthread+0xe8/0xf8\n[   72.177130]  ret_from_fork+0x10/0x20\n[   72.177289] Code: 54fff984 d503201f d2800080 91003261 (f820303f)\n[   72.177557] ---[ end trace 0000000000000000 ]---\n\nAlign struct nft_set_ext to word size to address this and\ndocumentation it.\n\npahole reports that this increases the size of elements for rhash and\npipapo in 8 bytes on x86_64.","modified":"2026-04-02T12:23:22.700Z","published":"2025-01-15T13:10:23.140Z","related":["MGASA-2025-0030","MGASA-2025-0032","SUSE-SU-2026:0474-1","SUSE-SU-2026:0475-1","SUSE-SU-2026:0495-1","SUSE-SU-2026:0496-1","SUSE-SU-2026:0617-1","SUSE-SU-2026:1131-1","SUSE-SU-2026:20555-1","SUSE-SU-2026:20599-1","SUSE-SU-2026:20615-1","openSUSE-SU-2026:20287-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/54xxx/CVE-2024-54031.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/277f00b0c2dca8794cf4837722960bdc4174911f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/352f8eaaabd008f09d1e176194edc261a7304084"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4f49349c1963e507aa37c1ec05178faeb0103959"},{"type":"WEB","url":"https://git.kernel.org/stable/c/542ed8145e6f9392e3d0a86a0e9027d2ffd183e4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/607774a13764676d4b8be9c8b9c66b8cf3469043"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6a14b46052eeb83175a95baf399283860b9d94c4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d24cbc43cc7b41a0824b0bc6ec4d8436d8d7a9c0"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/54xxx/CVE-2024-54031.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-54031"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"98d62cf0e26305dd6a1932a4054004290f4194bb"},{"fixed":"352f8eaaabd008f09d1e176194edc261a7304084"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"e21855091f11df80d41239dbc5f8545b772c657d"},{"fixed":"6a14b46052eeb83175a95baf399283860b9d94c4"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"59a59da8de47848575eedc141a74aae57696706d"},{"fixed":"277f00b0c2dca8794cf4837722960bdc4174911f"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"23a6919bb3ecf6787f060476ee6810ad55ebf9c8"},{"fixed":"607774a13764676d4b8be9c8b9c66b8cf3469043"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"86c27603514cb8ead29857365cdd145404ee9706"},{"fixed":"4f49349c1963e507aa37c1ec05178faeb0103959"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"be4d0ac67d92e6a285cd3eeb672188d249c121b2"},{"fixed":"d24cbc43cc7b41a0824b0bc6ec4d8436d8d7a9c0"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"7ffc7481153bbabf3332c6a19b289730c7e1edf5"},{"fixed":"542ed8145e6f9392e3d0a86a0e9027d2ffd183e4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-54031.json"}}],"schema_version":"1.7.5"}