nf_tables: nft_dynset: fix possible stateful expression memleak in error path

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Summary

CVECVE-2026-23399
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-03-28 08:15:56 UTC
Updated2026-06-01 17:16:45 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: nf_tables: nft_dynset: fix possible stateful expression memleak in error path If cloning the second stateful expression in the element via GFP_ATOMIC fails, then the first stateful expression remains in place without being released.   unreferenced object (percpu) 0x607b97e9cab8 (size 16):     comm "softirq", pid 0, jiffies 4294931867     hex dump (first 16 bytes on cpu 3):       00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00     backtrace (crc 0):       pcpu_alloc_noprof+0x453/0xd80       nft_counter_clone+0x9c/0x190 [nf_tables]       nft_expr_clone+0x8f/0x1b0 [nf_tables]       nft_dynset_new+0x2cb/0x5f0 [nf_tables]       nft_rhash_update+0x236/0x11c0 [nf_tables]       nft_dynset_eval+0x11f/0x670 [nf_tables]       nft_do_chain+0x253/0x1700 [nf_tables]       nft_do_chain_ipv4+0x18d/0x270 [nf_tables]       nf_hook_slow+0xaa/0x1e0       ip_local_deliver+0x209/0x330

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.000230000 probability, percentile 0.061900000 (date 2026-04-06)

Problem Types: CWE-401

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 563125a73ac30d7036ae69ca35c40500562c1de4 eb7bf413e59945df03d4567b73ce464eebe2f4ea git Not specified
CNA Linux Linux affected 563125a73ac30d7036ae69ca35c40500562c1de4 4357dbb1d9c35ca0b4443d71c98a48e6666f7689 git Not specified
CNA Linux Linux affected 563125a73ac30d7036ae69ca35c40500562c1de4 e6661add2d9c6913e1dad97336595e23a2bed195 git Not specified
CNA Linux Linux affected 563125a73ac30d7036ae69ca35c40500562c1de4 d1354873cbe3b344899c4311ac05897fd83e3f21 git Not specified
CNA Linux Linux affected 563125a73ac30d7036ae69ca35c40500562c1de4 31641c682db73353e4647e40735c7f2a75ff58ef git Not specified
CNA Linux Linux affected 563125a73ac30d7036ae69ca35c40500562c1de4 c88a9fd26cee365bec932196f76175772a941cca git Not specified
CNA Linux Linux affected 563125a73ac30d7036ae69ca35c40500562c1de4 0548a13b5a145b16e4da0628b5936baf35f51b43 git Not specified
CNA Linux Linux affected 5.11 Not specified
CNA Linux Linux unaffected 5.11 semver Not specified
CNA Linux Linux unaffected 5.15.209 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.175 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.136 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.78 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.20 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.10 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/eb7bf413e59945df03d4567b73ce464eebe2f4ea 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/0548a13b5a145b16e4da0628b5936baf35f51b43 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/4357dbb1d9c35ca0b4443d71c98a48e6666f7689 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e6661add2d9c6913e1dad97336595e23a2bed195 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d1354873cbe3b344899c4311ac05897fd83e3f21 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/c88a9fd26cee365bec932196f76175772a941cca 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/31641c682db73353e4647e40735c7f2a75ff58ef 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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