netdevsim: zero initialize struct iphdr in dummy sk_buff

Summary

CVECVE-2026-52985
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-24 17:17:09 UTC
Updated2026-06-24 17:17:09 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: netdevsim: zero initialize struct iphdr in dummy sk_buff Syzbot reports a KMSAN uninit-value originating from nsim_dev_trap_skb_build, with the allocation also being performed in the same function. Fix this by calling skb_put_zero instead of skb_put to guarantee zero initialization of the whole IP header.

Risk And Classification

EPSS: 0.001760000 probability, percentile 0.073580000 (date 2026-06-25)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected da58f90f11f597520f226caff1d3cfc115abedc9 175556c049eaec14efde8c6475e763b7579b9de7 git Not specified
CNA Linux Linux affected da58f90f11f597520f226caff1d3cfc115abedc9 6e2cfd0904976e701d7a76b86b694e72af230ab0 git Not specified
CNA Linux Linux affected da58f90f11f597520f226caff1d3cfc115abedc9 1b7b6ae0e93b8d512e208b1378d74af052e4f4e7 git Not specified
CNA Linux Linux affected da58f90f11f597520f226caff1d3cfc115abedc9 818f7673ed7f4a29d4b9cee8184c47d6e57162b4 git Not specified
CNA Linux Linux affected da58f90f11f597520f226caff1d3cfc115abedc9 978ca6ff789f1f19c03288ac20cc1f4774e88490 git Not specified
CNA Linux Linux affected da58f90f11f597520f226caff1d3cfc115abedc9 750d0091bebf44975421268d37484ef87060d263 git Not specified
CNA Linux Linux affected da58f90f11f597520f226caff1d3cfc115abedc9 bc6002865e8c4fcf9e94975f7cf023448d8764e2 git Not specified
CNA Linux Linux affected da58f90f11f597520f226caff1d3cfc115abedc9 35eaa6d8d6c2ee65e96f507add856e0eacf24591 git Not specified
CNA Linux Linux affected 5.4 Not specified
CNA Linux Linux unaffected 5.4 semver Not specified
CNA Linux Linux unaffected 5.10.258 5.10.* 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 6.6.141 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.91 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.33 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.10 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/750d0091bebf44975421268d37484ef87060d263 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/bc6002865e8c4fcf9e94975f7cf023448d8764e2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1b7b6ae0e93b8d512e208b1378d74af052e4f4e7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/978ca6ff789f1f19c03288ac20cc1f4774e88490 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/35eaa6d8d6c2ee65e96f507add856e0eacf24591 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6e2cfd0904976e701d7a76b86b694e72af230ab0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/818f7673ed7f4a29d4b9cee8184c47d6e57162b4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/175556c049eaec14efde8c6475e763b7579b9de7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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