CVE record · CVE-2026-43198

tcp: fix potential race in tcp_v6_syn_recv_sock()

CVSS 9.8 CriticalCriticalEPSS 0.0030 · 22nd percentile

Critical, because:

CVSS score 9.8: 9.0 or more.

Published by the CVE Program (CNA: Linux) at 6 May 2026, 11:28 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Linux	Linux	affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before aef4a9ae95d1bc4f7897065011e6261026719aeb git affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before dad1fe7db6c6519138430ac8f5e589c18f83bfc9 git affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before a7e761ba55efaa9c49e0afdd304bb78167af3429 git affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before cd644e6dc72eec8d9d988717ea1c54f8668ded69 git affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 9ed654e340f4c73bc6f0af2fbc90ac293e645ce0 git affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before fe89b2f05b854847784f91127319172945c1fadd git affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 7178e2a8027423b2af17ab95df73a749a5b72e5b git affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 858d2a4f67ff69e645a43487ef7ea7f28f06deae git Other versions: unaffected
Linux	Linux	affected 2.6.12 unaffected before 2.6.12 semver unaffected 5.10.270 to 5.10., inclusive semver unaffected 5.15.221 to 5.15., inclusive semver unaffected 6.1.188 to 6.1., inclusive semver unaffected 6.6.157 to 6.6., inclusive semver unaffected 6.12.110 to 6.12., inclusive semver unaffected 6.18.16 to 6.18., inclusive semver unaffected 6.19.6 to 6.19., inclusive semver unaffected 7.0 to , inclusive original_commit_for_fix Other versions: affected

Identifiers: CVE-2026-43198
CNA: Linux
Weakness (CWE): CWE-362 · CWE-821
Tags: Linux kernel
Race condition
CWE-821
Published: 6 May 2026
Updated: 19 Oct 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
9.8	Critical	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	CNA (Linux)Used for this record
7.0	High	3.1	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H	ADP (redhat-SADP)

CISA KEV Not listed.
EPSS 0.0030, the 22nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 6 May 2026. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.