ghsa-3cpc-x5c2-65qq
Vulnerability from github
Published
2025-01-15 15:31
Modified
2025-01-15 15:31
Details

In the Linux kernel, the following vulnerability has been resolved:

netfilter: nft_set_hash: unaligned atomic read on struct nft_set_ext

Access to genmask field in struct nft_set_ext results in unaligned atomic read:

[ 72.130109] Unable to handle kernel paging request at virtual address ffff0000c2bb708c [ 72.131036] Mem abort info: [ 72.131213] ESR = 0x0000000096000021 [ 72.131446] EC = 0x25: DABT (current EL), IL = 32 bits [ 72.132209] SET = 0, FnV = 0 [ 72.133216] EA = 0, S1PTW = 0 [ 72.134080] FSC = 0x21: alignment fault [ 72.135593] Data abort info: [ 72.137194] ISV = 0, ISS = 0x00000021, ISS2 = 0x00000000 [ 72.142351] CM = 0, WnR = 0, TnD = 0, TagAccess = 0 [ 72.145989] GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 [ 72.150115] swapper pgtable: 4k pages, 48-bit VAs, pgdp=0000000237d27000 [ 72.154893] [ffff0000c2bb708c] pgd=0000000000000000, p4d=180000023ffff403, pud=180000023f84b403, pmd=180000023f835403, +pte=0068000102bb7707 [ 72.163021] Internal error: Oops: 0000000096000021 [#1] SMP [...] [ 72.170041] CPU: 7 UID: 0 PID: 54 Comm: kworker/7:0 Tainted: G E 6.13.0-rc3+ #2 [ 72.170509] Tainted: [E]=UNSIGNED_MODULE [ 72.170720] Hardware name: QEMU QEMU Virtual Machine, BIOS edk2-stable202302-for-qemu 03/01/2023 [ 72.171192] Workqueue: events_power_efficient nft_rhash_gc [nf_tables] [ 72.171552] pstate: 21400005 (nzCv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--) [ 72.171915] pc : nft_rhash_gc+0x200/0x2d8 [nf_tables] [ 72.172166] lr : nft_rhash_gc+0x128/0x2d8 [nf_tables] [ 72.172546] sp : ffff800081f2bce0 [ 72.172724] x29: ffff800081f2bd40 x28: ffff0000c2bb708c x27: 0000000000000038 [ 72.173078] x26: ffff0000c6780ef0 x25: ffff0000c643df00 x24: ffff0000c6778f78 [ 72.173431] x23: 000000000000001a x22: ffff0000c4b1f000 x21: ffff0000c6780f78 [ 72.173782] x20: ffff0000c2bb70dc x19: ffff0000c2bb7080 x18: 0000000000000000 [ 72.174135] x17: ffff0000c0a4e1c0 x16: 0000000000003000 x15: 0000ac26d173b978 [ 72.174485] x14: ffffffffffffffff x13: 0000000000000030 x12: ffff0000c6780ef0 [ 72.174841] x11: 0000000000000000 x10: ffff800081f2bcf8 x9 : ffff0000c3000000 [ 72.175193] x8 : 00000000000004be x7 : 0000000000000000 x6 : 0000000000000000 [ 72.175544] x5 : 0000000000000040 x4 : ffff0000c3000010 x3 : 0000000000000000 [ 72.175871] x2 : 0000000000003a98 x1 : ffff0000c2bb708c x0 : 0000000000000004 [ 72.176207] Call trace: [ 72.176316] nft_rhash_gc+0x200/0x2d8 [nf_tables] (P) [ 72.176653] process_one_work+0x178/0x3d0 [ 72.176831] worker_thread+0x200/0x3f0 [ 72.176995] kthread+0xe8/0xf8 [ 72.177130] ret_from_fork+0x10/0x20 [ 72.177289] Code: 54fff984 d503201f d2800080 91003261 (f820303f) [ 72.177557] ---[ end trace 0000000000000000 ]---

Align struct nft_set_ext to word size to address this and documentation it.

pahole reports that this increases the size of elements for rhash and pipapo in 8 bytes on x86_64.

Show details on source website

To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2024-54031"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-01-15T13:15:11Z",
    "severity": null
  },
  "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.",
  "id": "GHSA-3cpc-x5c2-65qq",
  "modified": "2025-01-15T15:31:24Z",
  "published": "2025-01-15T15:31:24Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-54031"
    },
    {
      "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"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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