CVE-2026-31430
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
X.509: Fix out-of-bounds access when parsing extensions
In the Linux kernel, the following vulnerability has been resolved: X.509: Fix out-of-bounds access when parsing extensions Leo reports an out-of-bounds access when parsing a certificate with empty Basic Constraints or Key Usage extension because the first byte of the extension is read before checking its length. Fix it. The bug can be triggered by an unprivileged user by submitting a specially crafted certificate to the kernel through the keyrings(7) API. Leo has demonstrated this with a proof-of-concept program responsibly disclosed off-list.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 30eae2b037af54b24109dcaea21db46f6285c69b | affected | git | 672b526def1f94c1be8eb11b885b803da0d8c2f1 | Unavailable | None listed |
| 30eae2b037af54b24109dcaea21db46f6285c69b | affected | git | 30ab358fad0c7daa1d282ec48089901b21b36a20 | Unavailable | None listed |
| 30eae2b037af54b24109dcaea21db46f6285c69b | affected | git | 206121294b9cf27f0589857f80d64f87e496ffb2 | Unavailable | None listed |
| 30eae2b037af54b24109dcaea21db46f6285c69b | affected | git | 7fb4dadc2734f4020d7543d688b8d49c8e569c61 | Unavailable | None listed |
| 30eae2b037af54b24109dcaea21db46f6285c69b | affected | git | d702c3408213bb12bd570bb97204d8340d141c51 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 6.4 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 6.4 | Unavailable | None listed |
| 6.6.135 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.82 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.23 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 6.19.13 | unaffected | semver | Unavailable | 6.19.* | None listed |
| 7.0 | unaffected | original_commit_for_fix | Unavailable | * | None listed |