CVE-2025-21646
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2025
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
afs: Fix the maximum cell name length
In the Linux kernel, the following vulnerability has been resolved: afs: Fix the maximum cell name length The kafs filesystem limits the maximum length of a cell to 256 bytes, but a problem occurs if someone actually does that: kafs tries to create a directory under /proc/net/afs/ with the name of the cell, but that fails with a warning: WARNING: CPU: 0 PID: 9 at fs/proc/generic.c:405 because procfs limits the maximum filename length to 255. However, the DNS limits the maximum lookup length and, by extension, the maximum cell name, to 255 less two (length count and trailing NUL). Fix this by limiting the maximum acceptable cellname length to 253. This also allows us to be sure we can create the "/afs/.<cell>/" mountpoint too. Further, split the YFS VL record cell name maximum to be the 256 allowed by the protocol and ignore the record retrieved by YFSVL.GetCellName if it exceeds 253.
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) |
|---|---|---|---|---|---|
| c3e9f888263bb4df11cbd623ceced02081cb2f9f | affected | git | 9340385468d056bb700b8f28df236b81fc86a079 | Unavailable | None listed |
| c3e9f888263bb4df11cbd623ceced02081cb2f9f | affected | git | 7cb3e77e9b4e6ffa325a5559393d3283c9af3d01 | Unavailable | None listed |
| c3e9f888263bb4df11cbd623ceced02081cb2f9f | affected | git | aabe47cf5ac5e1db2ae0635f189d836f67024904 | Unavailable | None listed |
| c3e9f888263bb4df11cbd623ceced02081cb2f9f | affected | git | 7673030efe0f8ca1056d3849d61784c6caa052af | Unavailable | None listed |
| c3e9f888263bb4df11cbd623ceced02081cb2f9f | affected | git | 7922b1f058fe24a93730511dd0ae2e1630920096 | Unavailable | None listed |
| c3e9f888263bb4df11cbd623ceced02081cb2f9f | affected | git | 8fd56ad6e7c90ac2bddb0741c6b248c8c5d56ac8 | 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) |
|---|---|---|---|---|---|
| 5.8 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.8 | Unavailable | None listed |
| 5.10.234 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.177 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.125 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.72 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.10 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.13 | unaffected | original_commit_for_fix | Unavailable | * | None listed |