CVE-2022-49762
ntfs: check overflow when iterating ATTR_RECORDs
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: ntfs: check overflow when iterating ATTR_RECORDs Kernel iterates over ATTR_RECORDs in mft record in ntfs_attr_find(). Because the ATTR_RECORDs are next to each other, kernel can get the next ATTR_RECORD from end address of current ATTR_RECORD, through current ATTR_RECORD length field. The problem is that during iteration, when kernel calculates the end address of current ATTR_RECORD, kernel may trigger an integer overflow bug in executing `a = (ATTR_RECORD*)((u8*)a + le32_to_cpu(a->length))`. This may wrap, leading to a forever iteration on 32bit systems. This patch solves it by adding some checks on calculating end address of current ATTR_RECORD during iteration.
Timeline
ID reserved
By Linux
- 35 days later
· 35 days later
Published
- 13 months later
· 13 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.22% · top 88% of all CVEs (7 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 5559eb5809353a83a40a1e4e7f066431c7b83020
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 86f36de14dce5802856bb7a5921d74439db00b64
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 45683723f6b53e39e8a4cec0894e61fd6ec71989
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < b612f924f296408d7d02fb4cd01218afd4ed7184
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 957732a09c3828267c2819d31c425aa793dd475b
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < b63ddb3ba61e2d3539f87e095c881e552bc45dab
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 785b2af9654b8beac55644e36da0085c5d776361
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 63095f4f3af59322bea984a6ae44337439348fe0
- affected 2.6.12
- unaffected < 2.6.12
- unaffected 4.9.334 – ≤ 4.9.*
- unaffected 4.14.300 – ≤ 4.14.*
- unaffected 4.19.267 – ≤ 4.19.*
- unaffected 5.4.225 – ≤ 5.4.*
- unaffected 5.10.156 – ≤ 5.10.*
- unaffected 5.15.80 – ≤ 5.15.*
- unaffected 6.0.10 – ≤ 6.0.*
- unaffected 6.1 – ≤ *
References (8)
- https://git.kernel.org/stable/c/5559eb5809353a83a40a1e4e7f066431c7b83020 (opens in a new tab)
- https://git.kernel.org/stable/c/86f36de14dce5802856bb7a5921d74439db00b64 (opens in a new tab)
- https://git.kernel.org/stable/c/45683723f6b53e39e8a4cec0894e61fd6ec71989 (opens in a new tab)
- https://git.kernel.org/stable/c/b612f924f296408d7d02fb4cd01218afd4ed7184 (opens in a new tab)
- https://git.kernel.org/stable/c/957732a09c3828267c2819d31c425aa793dd475b (opens in a new tab)
- https://git.kernel.org/stable/c/b63ddb3ba61e2d3539f87e095c881e552bc45dab (opens in a new tab)
- https://git.kernel.org/stable/c/785b2af9654b8beac55644e36da0085c5d776361 (opens in a new tab)
- https://git.kernel.org/stable/c/63095f4f3af59322bea984a6ae44337439348fe0 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-49762)Record last updated .