CVE-2026-90247
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)
bpf: Fix mmap_lock leak in irq_work path
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix mmap_lock leak in irq_work path stack_map_get_build_id_offset() introduced a per-CPU irq_work to defer mmap_read_unlock() from NMI context, and bpf_find_vma() later reused the same mmap_unlock_work. Both callers only check whether the work is busy before taking mmap_lock, so a nested caller can reuse the slot before the first caller queues it. Two read locks may then be acquired while only one deferred unlock runs, leaking a read lock and blocking exit_mmap(). Reserve the per-CPU slot before mmap_read_trylock(). Use the same wrapper in stackmap and bpf_find_vma() so both callers release the reservation on trylock failure. Keep rejecting the slot while the irq_work remains busy. Release it after the irq_work callback unlocks the mm.
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) |
|---|---|---|---|---|---|
| eac9153f2b584c702cea02c1f1a57d85aa9aea42 | affected | git | b6c9daf6097f9b39162b8e736a6ac7caf5ef6fc8 | Unavailable | None listed |
| eac9153f2b584c702cea02c1f1a57d85aa9aea42 | affected | git | 931f62311c058d79f29548f20943969bb441ce87 | Unavailable | None listed |
| eac9153f2b584c702cea02c1f1a57d85aa9aea42 | affected | git | a052ad5edccf5319f50ed955de4368f8318a9f20 | Unavailable | None listed |
| eac9153f2b584c702cea02c1f1a57d85aa9aea42 | affected | git | 051f2da26ce377f683b938a3382e0f16d02f3139 | Unavailable | None listed |
| eac9153f2b584c702cea02c1f1a57d85aa9aea42 | affected | git | fa9dcacdcdf487f0ffef64bf67622f1caed509f1 | Unavailable | None listed |
| a7f4da875c16f3b8bef0d9ec67528111045bfcd8 | affected | git | Unavailable | Unavailable | None listed |
| f1838da73cccb238b8be4ef464fce0168dc7ba84 | affected | git | Unavailable | Unavailable | None listed |
| 4.19.92 | affected | semver | 4.20 | Unavailable | None listed |
| 5.4.7 | affected | semver | 5.5 | 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) |
|---|---|---|---|---|---|
| 5.5 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.5 | Unavailable | None listed |
| 6.6.160 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.114 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.52 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.2.6 | unaffected | semver | Unavailable | 7.2.* | None listed |
| 7.3 | unaffected | original_commit_for_fix | Unavailable | * | None listed |