netfilter: conntrack: re-fetch conntrack after insertion

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2022-49561
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-02-26 07:01:31 UTC
Updated2026-08-04 10:17:51 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: re-fetch conntrack after insertion In case the conntrack is clashing, insertion can free skb->_nfct and set skb->_nfct to the already-confirmed entry. This wasn't found before because the conntrack entry and the extension space used to free'd after an rcu grace period, plus the race needs events enabled to trigger.

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

Problem Types: NVD-CWE-noinfo

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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 71d8c47fc653711c41bc3282e5b0e605b3727956 e97222b785e70e8973281666d709baad6523d8af git Not specified
CNA Linux Linux affected 71d8c47fc653711c41bc3282e5b0e605b3727956 92a999d1963eed0df666284e20055136ceabd12f git Not specified
CNA Linux Linux affected 71d8c47fc653711c41bc3282e5b0e605b3727956 b16bb373988da3ceb0308381634117e18b6ec60d git Not specified
CNA Linux Linux affected 71d8c47fc653711c41bc3282e5b0e605b3727956 91a36ec160ec1a0c8f5352b772dffcbb0b6023e3 git Not specified
CNA Linux Linux affected 71d8c47fc653711c41bc3282e5b0e605b3727956 01989d7eebb61c99bd4b88ebc8e261bd2f02caed git Not specified
CNA Linux Linux affected 71d8c47fc653711c41bc3282e5b0e605b3727956 04f9e9104c969d8ce10a4a43634f641ed082092d git Not specified
CNA Linux Linux affected 71d8c47fc653711c41bc3282e5b0e605b3727956 04e4a11dc723c52db7a36dc58f0d69ce6426f8f0 git Not specified
CNA Linux Linux affected 71d8c47fc653711c41bc3282e5b0e605b3727956 56b14ecec97f39118bf85c9ac2438c5a949509ed git Not specified
CNA Linux Linux affected 4.7 Not specified
CNA Linux Linux unaffected 4.7 semver Not specified
CNA Linux Linux unaffected 4.14.282 4.14.* semver Not specified
CNA Linux Linux unaffected 4.19.246 4.19.* semver Not specified
CNA Linux Linux unaffected 5.4.197 5.4.* semver Not specified
CNA Linux Linux unaffected 5.10.120 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.45 5.15.* semver Not specified
CNA Linux Linux unaffected 5.17.13 5.17.* semver Not specified
CNA Linux Linux unaffected 5.18.2 5.18.* semver Not specified
CNA Linux Linux unaffected 5.19 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/e97222b785e70e8973281666d709baad6523d8af 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/04e4a11dc723c52db7a36dc58f0d69ce6426f8f0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/b16bb373988da3ceb0308381634117e18b6ec60d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/04f9e9104c969d8ce10a4a43634f641ed082092d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/01989d7eebb61c99bd4b88ebc8e261bd2f02caed 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/56b14ecec97f39118bf85c9ac2438c5a949509ed 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/92a999d1963eed0df666284e20055136ceabd12f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/91a36ec160ec1a0c8f5352b772dffcbb0b6023e3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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