netfilter: nf_conntrack_sip: fix OOB read in sip_skip_whitespace()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-98077
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-25 11:17:37 UTC
Updated2026-09-30 14:10:59 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_sip: fix OOB read in sip_skip_whitespace() sip_skip_whitespace() returns dptr unchanged when its own loop exhausts the buffer (dptr == limit), instead of NULL like its sibling sip_follow_continuation() returns on its own "no more data" path. ct_sip_get_header() only checks for NULL after calling it: dptr = sip_skip_whitespace(dptr, limit); if (dptr == NULL) break; if (*dptr != ':' || ++dptr >= limit) break; so a recognized header name followed only by spaces/tabs running to the exact end of the SIP payload, with no colon, makes the very next statement read one byte past the buffer. Make both "no more data" outcomes return NULL, matching the convention sip_follow_continuation() already uses and that both existing callers already check for.

Risk And Classification

EPSS: 0.002000000 probability, percentile 0.088280000 (date 2026-09-27)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected ea45f12a2766dae54e5426a23e8f4bafdbe2782e 60c012b2d05e1558b0f30ea3f15a2c3ca2f24d94 git Not specified
CNA Linux Linux affected ea45f12a2766dae54e5426a23e8f4bafdbe2782e 4be8380e3af008f418f97992c06f23be649a430d git Not specified
CNA Linux Linux affected ea45f12a2766dae54e5426a23e8f4bafdbe2782e 4a30aa2ba007db18210dd52219ecbd5528c03523 git Not specified
CNA Linux Linux affected ea45f12a2766dae54e5426a23e8f4bafdbe2782e e8f8231824b5815f57ce62cba116e511b10196de git Not specified
CNA Linux Linux affected 2.6.26 Not specified
CNA Linux Linux unaffected 2.6.26 semver Not specified
CNA Linux Linux unaffected 6.12.111 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.53 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.7 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/4be8380e3af008f418f97992c06f23be649a430d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4a30aa2ba007db18210dd52219ecbd5528c03523 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/60c012b2d05e1558b0f30ea3f15a2c3ca2f24d94 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e8f8231824b5815f57ce62cba116e511b10196de 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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