CVE-2026-53239
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)
xfrm: policy: fix use-after-free on inexact bin in xfrm_policy_bysel_ctx()
In the Linux kernel, the following vulnerability has been resolved: xfrm: policy: fix use-after-free on inexact bin in xfrm_policy_bysel_ctx() Fix the race by pruning the bin while still holding xfrm_policy_lock, before dropping it. Use __xfrm_policy_inexact_prune_bin() directly since the lock is already held. The wrapper xfrm_policy_inexact_prune_bin() becomes unused and is removed. Race: CPU0 (XFRM_MSG_DELPOLICY) CPU1 (XFRM_MSG_NEWSPDINFO) ========================== ========================== xfrm_policy_bysel_ctx(): spin_lock_bh(xfrm_policy_lock) bin = xfrm_policy_inexact_lookup() __xfrm_policy_unlink(pol) spin_unlock_bh(xfrm_policy_lock) xfrm_policy_kill(ret) // wide window, lock not held xfrm_hash_rebuild(): spin_lock_bh(xfrm_policy_lock) __xfrm_policy_inexact_flush(): kfree_rcu(bin) // bin freed spin_unlock_bh(xfrm_policy_lock) xfrm_policy_inexact_prune_bin(bin) // UAF: bin is freed
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) |
|---|---|---|---|---|---|
| 6be3b0db6db82cf056a72cc18042048edd27f8ee | affected | git | 8fc536e9f6856230f19c7d13e71af064b6a77b22 | Unavailable | None listed |
| 6be3b0db6db82cf056a72cc18042048edd27f8ee | affected | git | c4c1ea36d83bf3c4569468ca5b8b614fda1bf821 | Unavailable | None listed |
| 6be3b0db6db82cf056a72cc18042048edd27f8ee | affected | git | 25c8c7fb3b0b9668c7d05e209f58c158d2b020c7 | Unavailable | None listed |
| 6be3b0db6db82cf056a72cc18042048edd27f8ee | affected | git | 42827d03f8009a6a218bacab153e21f39d6a121c | Unavailable | None listed |
| 6be3b0db6db82cf056a72cc18042048edd27f8ee | affected | git | 88697cf980222d5906a37bf47662dac0732e2a0f | Unavailable | None listed |
| 6be3b0db6db82cf056a72cc18042048edd27f8ee | affected | git | b5316e2b8614a87d8736941972441cb47bfd4491 | Unavailable | None listed |
| 6be3b0db6db82cf056a72cc18042048edd27f8ee | affected | git | ec82ea4eb220164d854f8734ca5a35e23e577b94 | Unavailable | None listed |
| 6be3b0db6db82cf056a72cc18042048edd27f8ee | affected | git | 7f2d76c9c03257c0782afef9d95321fa04096f60 | 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) |
|---|---|---|---|---|---|
| 5.0 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.0 | Unavailable | None listed |
| 5.10.259 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.210 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.176 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.143 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.94 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.36 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.0.13 | unaffected | semver | Unavailable | 7.0.* | None listed |
| 7.1 | unaffected | original_commit_for_fix | Unavailable | * | None listed |