Answer in brief
CVE-2026-53239 records a High severity (CVSS 7.8) vulnerability in xfrm: policy: fix use-after-free on inexact bin in xfrm_policy_bysel_ctx(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2026-53239 records a High severity (CVSS 7.8) vulnerability in xfrm: policy: fix use-after-free on inexact bin in xfrm_policy_bysel_ctx(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=6be3b0db6db82cf056a72cc18042048edd27f8ee <8fc536e9f6856230f19c7d13e71af064b6a77b22 || >=6be3b0db6db82cf056a72cc18042048edd27f8ee <c4c1ea36d83bf3c4569468ca5b8b614fda1bf821 || >=6be3b0db6db82cf056a72cc18042048edd27f8ee <25c8c7fb3b0b9668c7d05e209f58c158d2b020c7 || >=6be3b0db6db82cf056a72cc18042048edd27f8ee <42827d03f8009a6a218bacab153e21f39d6a121c || >=6be3b0db6db82cf056a72cc18042048edd27f8ee <88697cf980222d5906a37bf47662dac0732e2a0f || >=6be3b0db6db82cf056a72cc18042048edd27f8ee <b5316e2b8614a87d8736941972441cb47bfd4491 || >=6be3b0db6db82cf056a72cc18042048edd27f8ee <ec82ea4eb220164d854f8734ca5a35e23e577b94 || >=6be3b0db6db82cf056a72cc18042048edd27f8ee <7f2d76c9c03257c0782afef9d95321fa04096f60 | 8fc536e9f6856230f19c7d13e71af064b6a77b22, c4c1ea36d83bf3c4569468ca5b8b614fda1bf821, 25c8c7fb3b0b9668c7d05e209f58c158d2b020c7, 42827d03f8009a6a218bacab153e21f39d6a121c, 88697cf980222d5906a37bf47662dac0732e2a0f, b5316e2b8614a87d8736941972441cb47bfd4491, ec82ea4eb220164d854f8734ca5a35e23e577b94, 7f2d76c9c03257c0782afef9d95321fa04096f60 |
| Linux/Linuxgeneric | 5.0 | Not reported |
Published upstream
Jun 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 25, 2026
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
Quoted source text, attributed separately from HOL analysis.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=6be3b0db6db82cf056a72cc18042048edd27f8ee <8fc536e9f6856230f19c7d13e71af064b6a77b22 || >=6be3b0db6db82cf056a72cc18042048edd27f8ee <c4c1ea36d83bf3c4569468ca5b8b614fda1bf821 || >=6be3b0db6db82cf056a72cc18042048edd27f8ee <25c8c7fb3b0b9668c7d05e209f58c158d2b020c7 || >=6be3b0db6db82cf056a72cc18042048edd27f8ee <42827d03f8009a6a218bacab153e21f39d6a121c || >=6be3b0db6db82cf056a72cc18042048edd27f8ee <88697cf980222d5906a37bf47662dac0732e2a0f || >=6be3b0db6db82cf056a72cc18042048edd27f8ee <b5316e2b8614a87d8736941972441cb47bfd4491 || >=6be3b0db6db82cf056a72cc18042048edd27f8ee <ec82ea4eb220164d854f8734ca5a35e23e577b94 || >=6be3b0db6db82cf056a72cc18042048edd27f8ee <7f2d76c9c03257c0782afef9d95321fa04096f60 | 8fc536e9f6856230f19c7d13e71af064b6a77b22, c4c1ea36d83bf3c4569468ca5b8b614fda1bf821, 25c8c7fb3b0b9668c7d05e209f58c158d2b020c7, 42827d03f8009a6a218bacab153e21f39d6a121c, 88697cf980222d5906a37bf47662dac0732e2a0f, b5316e2b8614a87d8736941972441cb47bfd4491, ec82ea4eb220164d854f8734ca5a35e23e577b94, 7f2d76c9c03257c0782afef9d95321fa04096f60 |
| Linux/Linuxgeneric | 5.0 | Not reported |
Published upstream
Jun 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 25, 2026
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
Quoted source text, attributed separately from HOL analysis.