CVE-2025-40201
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)
kernel/sys.c: fix the racy usage of task_lock(tsk->group_leader) in sys_prlimit64() paths
In the Linux kernel, the following vulnerability has been resolved: kernel/sys.c: fix the racy usage of task_lock(tsk->group_leader) in sys_prlimit64() paths The usage of task_lock(tsk->group_leader) in sys_prlimit64()->do_prlimit() path is very broken. sys_prlimit64() does get_task_struct(tsk) but this only protects task_struct itself. If tsk != current and tsk is not a leader, this process can exit/exec and task_lock(tsk->group_leader) may use the already freed task_struct. Another problem is that sys_prlimit64() can race with mt-exec which changes ->group_leader. In this case do_prlimit() may take the wrong lock, or (worse) ->group_leader may change between task_lock() and task_unlock(). Change sys_prlimit64() to take tasklist_lock when necessary. This is not nice, but I don't see a better fix for -stable.
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) |
|---|---|---|---|---|---|
| 18c91bb2d87268d23868bf13508f5bc9cf04e89a | affected | git | 1bc0d9315ef5296abb2c9fd840336255850ded18 | Unavailable | None listed |
| 18c91bb2d87268d23868bf13508f5bc9cf04e89a | affected | git | 132f827e7bac7373e1522e89709d70b43cae5342 | Unavailable | None listed |
| 18c91bb2d87268d23868bf13508f5bc9cf04e89a | affected | git | 19b45c84bd9fd42fa97ff80c6350d604cb871c75 | Unavailable | None listed |
| 18c91bb2d87268d23868bf13508f5bc9cf04e89a | affected | git | 6796412decd2d8de8ec708213bbc958fab72f143 | Unavailable | None listed |
| 18c91bb2d87268d23868bf13508f5bc9cf04e89a | affected | git | a15f37a40145c986cdf289a4b88390f35efdecc4 | 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) |
|---|---|---|---|---|---|
| 5.18 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.18 | Unavailable | None listed |
| 6.1.157 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.113 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.54 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.17.4 | unaffected | semver | Unavailable | 6.17.* | None listed |
| 6.18 | unaffected | original_commit_for_fix | Unavailable | * | None listed |