CVE-2025-39999
published 2025-10-15CVE-2025-39999: In the Linux kernel, the following vulnerability has been resolved: blk-mq: fix blk_mq_tags double free while nr_requests grown In the case user trigger tags…
PriorityP419medium5.2
EPSS
0.18%
8.2th percentile
In the Linux kernel, the following vulnerability has been resolved:
blk-mq: fix blk_mq_tags double free while nr_requests grown
In the case user trigger tags grow by queue sysfs attribute nr_requests,
hctx->sched_tags will be freed directly and replaced with a new
allocated tags, see blk_mq_tag_update_depth().
The problem is that hctx->sched_tags is from elevator->et->tags, while
et->tags is still the freed tags, hence later elevator exit will try to
free the tags again, causing kernel panic.
Fix this problem by replacing et->tags with new allocated tags as well.
Noted there are still some long term problems that will require some
refactor to be fixed thoroughly[1].
[1] https://lore.kernel.org/all/[email protected]/
Affected
9 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.16.11-1 (forky) | linux 6.16.11-1 (forky) |
| linux | linux | — | — |
| linux | linux | >= 58567d8e95c096ad234963df90a2ca518901f4b6 < 8faee580d63bc2a54a59dcdb7f9ce4de29384fec | 8faee580d63bc2a54a59dcdb7f9ce4de29384fec |
| linux | linux | >= 6.16.4 < 6.16.11 | 6.16.11 |
| linux | linux | >= f5a6604f7a4405450e4a1f54e5430f47290c500f < 392b1d64911f4de8887fe8b68299fa8bd6e5b923 | 392b1d64911f4de8887fe8b68299fa8bd6e5b923 |
| linux | linux | >= f5a6604f7a4405450e4a1f54e5430f47290c500f < ba28afbd9eff2a6370f23ef4e6a036ab0cfda409 | ba28afbd9eff2a6370f23ef4e6a036ab0cfda409 |
| linux | linux_kernel | >= 0 < 6.16.11-1 | 6.16.11-1 |
| linux | linux_kernel | >= 0 < 6.16.11 | 6.16.11 |
| linux | linux_kernel | >= 6.17.0 < 6.17.1 | 6.17.1 |
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GHSA
GHSA-28j8-2q92-jm59: In the Linux kernel, the following vulnerability has been resolved:
blk-mq: fix blk_mq_tags double free while nr_requests grown
In the case user tri
ghsa_unreviewed·2025-10-15
CVE-2025-39999 GHSA-28j8-2q92-jm59: In the Linux kernel, the following vulnerability has been resolved:
blk-mq: fix blk_mq_tags double free while nr_requests grown
In the case user tri
In the Linux kernel, the following vulnerability has been resolved:
blk-mq: fix blk_mq_tags double free while nr_requests grown
In the case user trigger tags grow by queue sysfs attribute nr_requests,
hctx->sched_tags will be freed directly and replaced with a new
allocated tags, see blk_mq_tag_update_depth().
The problem is that hctx->sched_tags is from elevator->et->tags, while
et->tags is still the freed tags, hence later elevator exit will try to
free the tags again, causing kernel panic.
Fix this problem by replacing et->tags with new allocated tags as well.
Noted there are still some long term problems that will require some
refactor to be fixed thoroughly[1].
[1] https://lore.kernel.org/all/[email protected]/
OSV
CVE-2025-39999: In the Linux kernel, the following vulnerability has been resolved: blk-mq: fix blk_mq_tags double free while nr_requests grown In the case user trigg
osv·2025-10-15
CVE-2025-39999 CVE-2025-39999: In the Linux kernel, the following vulnerability has been resolved: blk-mq: fix blk_mq_tags double free while nr_requests grown In the case user trigg
In the Linux kernel, the following vulnerability has been resolved: blk-mq: fix blk_mq_tags double free while nr_requests grown In the case user trigger tags grow by queue sysfs attribute nr_requests, hctx->sched_tags will be freed directly and replaced with a new allocated tags, see blk_mq_tag_update_depth(). The problem is that hctx->sched_tags is from elevator->et->tags, while et->tags is still the freed tags, hence later elevator exit will try to free the tags again, causing kernel panic. Fix this problem by replacing et->tags with new allocated tags as well. Noted there are still some long term problems that will require some refactor to be fixed thoroughly[1]. [1] https://lore.kernel.org/all/[email protected]/
OSV
blk-mq: fix blk_mq_tags double free while nr_requests grown
osv·2025-10-15
CVE-2025-39999 blk-mq: fix blk_mq_tags double free while nr_requests grown
blk-mq: fix blk_mq_tags double free while nr_requests grown
In the Linux kernel, the following vulnerability has been resolved:
blk-mq: fix blk_mq_tags double free while nr_requests grown
In the case user trigger tags grow by queue sysfs attribute nr_requests,
hctx->sched_tags will be freed directly and replaced with a new
allocated tags, see blk_mq_tag_update_depth().
The problem is that hctx->sched_tags is from elevator->et->tags, while
et->tags is still the freed tags, hence later elevator exit will try to
free the tags again, causing kernel panic.
Fix this problem by replacing et->tags with new allocated tags as well.
Noted there are still some long term problems that will require some
refactor to be fixed thoroughly[1].
[1] https://lore.kernel.org/all/20250815080216.410665-1-yu
Red Hat
kernel: blk-mq: fix blk_mq_tags double free while nr_requests grown
vendor_redhat·2025-10-15·CVSS 5.2
CVE-2025-39999 [MEDIUM] CWE-1341 kernel: blk-mq: fix blk_mq_tags double free while nr_requests grown
kernel: blk-mq: fix blk_mq_tags double free while nr_requests grown
In the Linux kernel, the following vulnerability has been resolved:
blk-mq: fix blk_mq_tags double free while nr_requests grown
In the case user trigger tags grow by queue sysfs attribute nr_requests,
hctx->sched_tags will be freed directly and replaced with a new
allocated tags, see blk_mq_tag_update_depth().
The problem is that hctx->sched_tags is from elevator->et->tags, while
et->tags is still the freed tags, hence later elevator exit will try to
free the tags again, causing kernel panic.
Fix this problem by replacing et->tags with new allocated tags as well.
Noted there are still some long term problems that will require some
refactor to be fixed thoroughly[1].
[1] https://lore.kernel.org/all/20250815080216.410665-1-
Debian
CVE-2025-39999: linux - In the Linux kernel, the following vulnerability has been resolved: blk-mq: fix...
vendor_debian·2025
CVE-2025-39999 [LOW] CVE-2025-39999: linux - In the Linux kernel, the following vulnerability has been resolved: blk-mq: fix...
In the Linux kernel, the following vulnerability has been resolved: blk-mq: fix blk_mq_tags double free while nr_requests grown In the case user trigger tags grow by queue sysfs attribute nr_requests, hctx->sched_tags will be freed directly and replaced with a new allocated tags, see blk_mq_tag_update_depth(). The problem is that hctx->sched_tags is from elevator->et->tags, while et->tags is still the freed tags, hence later elevator exit will try to free the tags again, causing kernel panic. Fix this problem by replacing et->tags with new allocated tags as well. Noted there are still some long term problems that will require some refactor to be fixed thoroughly[1]. [1] https://lore.kernel.org/all/[email protected]/
Scope: local
bookworm: resolved
bullseye: re
No detection rules found.
No public exploits indexed.
2025-10-15
Published