CVE-2024-41016 (GCVE-0-2024-41016)

Vulnerability from cvelistv5 – Published: 2024-07-29 06:37 – Updated: 2026-10-15 00:47
VLAI
Title
ocfs2: strict bound check before memcmp in ocfs2_xattr_find_entry()
Summary
In the Linux kernel, the following vulnerability has been resolved: ocfs2: strict bound check before memcmp in ocfs2_xattr_find_entry() xattr in ocfs2 maybe 'non-indexed', which saved with additional space requested. It's better to check if the memory is out of bound before memcmp, although this possibility mainly comes from crafted poisonous images.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 16:24 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6641 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: cf1d6c763fbcb115263114302485ad17e7933d87 , < e2b3d7a9d019d4d1a0da6c3ea64a1ff79c99c090 (git)
Affected: cf1d6c763fbcb115263114302485ad17e7933d87 , < e8f9c4af7af7e9e4cd09c0251c7936593147419f (git)
Affected: cf1d6c763fbcb115263114302485ad17e7933d87 , < 57a3d89831fcaa2cdbe024b47c7c36d5a56c3637 (git)
Affected: cf1d6c763fbcb115263114302485ad17e7933d87 , < c031d286eceb82f72f8623b7f4abd2aa491bfb5e (git)
Affected: cf1d6c763fbcb115263114302485ad17e7933d87 , < cfb926051fab19b10d1e65976211f364aa820180 (git)
Affected: cf1d6c763fbcb115263114302485ad17e7933d87 , < c726dea9d0c806d64c26fcef483b1fb9474d8c5e (git)
Affected: cf1d6c763fbcb115263114302485ad17e7933d87 , < e4ffea01adf3323c821b6f37e9577d2d400adbaa (git)
Affected: cf1d6c763fbcb115263114302485ad17e7933d87 , < af77c4fc1871847b528d58b7fdafb4aa1f6a9262 (git)
guessed Create a notification for this product.
Linux Linux Affected: 2.6.28
Unaffected: 0 , < 2.6.28 (semver)
Unaffected: 4.19.323 , ≤ 4.19.* (semver)
Unaffected: 5.4.285 , ≤ 5.4.* (semver)
Unaffected: 5.10.227 , ≤ 5.10.* (semver)
Unaffected: 5.15.168 , ≤ 5.15.* (semver)
Unaffected: 6.1.112 , ≤ 6.1.* (semver)
Unaffected: 6.6.53 , ≤ 6.6.* (semver)
Unaffected: 6.10.12 , ≤ 6.10.* (semver)
Unaffected: 6.11 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem Affected: 0 , < V1.1.1 (custom)
guessed Create a notification for this product.
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                  "value": "AV:L - Reaching `ocfs2_xattr_find_entry()` requires a crafted OCFS2 image to be present locally (loop-mounted file or attached block device/USB stick) and then touched via `getxattr()`/`setxattr()` or an automatic security-label lookup; there is no remote protocol path into the ocfs2 xattr code.\nAC:L - The attacker authors the on-disk metadata, and `xe_name_offset` is an unvalidated `__le16`, so the read at `xs-\u003ebase + name_offset` (up to 65535 bytes past a 512\u20134096 byte block buffer) fires deterministically on the first `getxattr()` with a matching type/name-length; no race, no memory-layout luck, and no non-default kernel config is involved, and for offsets inside the same page the \"out-of-bounds\" bytes are other blocks of the attacker\u0027s own image, making the `memcmp()` match reliably.\nPR:L - An unprivileged local user can supply the poisoned image (a file for loop-mount or removable media handled by udisks2/systemd automount) and then trigger the path with ordinary unprivileged `getxattr()`/`setxattr()` calls on the crafted file; no capability of the attacker\u0027s own is needed.\nUI:N - On the common desktop/kiosk/embedded deployment the attacker-supplied device is mounted automatically by the automount daemon, and the attacking process itself then issues the `getxattr()`/`setxattr()` that hits the unchecked `memcmp()` \u2014 no deliberate action by another user is required.\nS:U - The out-of-bounds read and the resulting out-of-bounds write stay inside the kernel\u0027s own memory and security authority; no VM, IOMMU, container, or sandbox boundary is crossed.\nC:H - Once the unchecked `memcmp()` matches out-of-bounds bytes, `ocfs2_xattr_ibody_get()`/`ocfs2_xattr_block_get()` `memcpy()` from `xs-\u003ebase + xe_name_offset + name_len` for `xe_value_size` bytes (attacker-chosen, up to XATTR_SIZE_MAX) straight into the caller\u0027s userspace buffer, disclosing kernel memory beyond the buffer_head; the match/no-match result also forms a byte-granular oracle over ~64 KiB past the buffer.\nI:H - The same missing check on the setxattr path (`ocfs2_xattr_ibody_find()`/`ocfs2_xattr_block_find()`) lets a bogus `xe_name_offset` propagate into `ocfs2_xa_set()`, where `ocfs2_xa_reuse_entry()`/`ocfs2_xa_store_value()` `memset()`/`memcpy()` attacker-supplied value bytes at `base + name_offset`, and `ocfs2_xa_block_wipe_namevalue()` `memmove()`s with that offset \u2014 an out-of-bounds heap write with controlled content suitable for control-flow hijacking.\nA:H - The read (and the subsequent write/memmove) can land up to ~65790 bytes past a 512\u20134096 byte block buffer, readily touching unmapped or unrelated memory and producing a kernel oops/page fault (immediate KASAN slab-out-of-bounds), and corrupting neighbouring kernel data crashes the system; the trigger is repeatable on demand."
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-05T11:34:42.104Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/e2b3d7a9d019d4d1a0da6c3ea64a1ff79c99c090"
            },
            {
              "url": "https://git.kernel.org/stable/c/e8f9c4af7af7e9e4cd09c0251c7936593147419f"
            },
            {
              "url": "https://git.kernel.org/stable/c/57a3d89831fcaa2cdbe024b47c7c36d5a56c3637"
            },
            {
              "url": "https://git.kernel.org/stable/c/c031d286eceb82f72f8623b7f4abd2aa491bfb5e"
            },
            {
              "url": "https://git.kernel.org/stable/c/cfb926051fab19b10d1e65976211f364aa820180"
            },
            {
              "url": "https://git.kernel.org/stable/c/c726dea9d0c806d64c26fcef483b1fb9474d8c5e"
            },
            {
              "url": "https://git.kernel.org/stable/c/e4ffea01adf3323c821b6f37e9577d2d400adbaa"
            },
            {
              "url": "https://git.kernel.org/stable/c/af77c4fc1871847b528d58b7fdafb4aa1f6a9262"
            }
          ],
          "title": "ocfs2: strict bound check before memcmp in ocfs2_xattr_find_entry()",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2024-41016",
        "datePublished": "2024-07-29T06:37:02.530Z",
        "dateReserved": "2024-07-12T12:17:45.612Z",
        "dateUpdated": "2026-10-15T00:47:16.242Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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