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Description

In the Linux kernel, the following vulnerability has been resolved: net: mctp: ensure our nlmsg responses are initialised Syed Faraz Abrar (@farazsth98) from Zellic, and Pumpkin (@u1f383) from DEVCORE Research Team working with Trend Micro Zero Day Initiative report that a RTM_GETNEIGH will return uninitalised data in the pad bytes of the ndmsg data. Ensure we're initialising the netlink data to zero, in the link, addr and neigh response messages.

PUBLISHED Reserved 2026-05-13 | Published 2026-05-27 | Updated 2026-06-09 | Assigner Linux

Product status

Default status
unaffected

583be982d93479ea3d85091b0fd0b01201ede87d (git) before 976612471a9e6ead6ceffc241e4d0a1aac90b36a
affected

583be982d93479ea3d85091b0fd0b01201ede87d (git) before 54ed418de62a148a655262da682a050fa05f7924
affected

583be982d93479ea3d85091b0fd0b01201ede87d (git) before 6fb6a97c86abb8592158088afaea0eb464cf9de1
affected

583be982d93479ea3d85091b0fd0b01201ede87d (git) before a6a9bc544b675d8b5180f2718ec985ad267b5cbf
affected

Default status
affected

5.15
affected

Any version before 5.15
unaffected

6.12.93 (semver)
unaffected

6.18.35 (semver)
unaffected

6.19.4 (semver)
unaffected

7.0 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/976612471a9e6ead6ceffc241e4d0a1aac90b36a

git.kernel.org/...c/54ed418de62a148a655262da682a050fa05f7924

git.kernel.org/...c/6fb6a97c86abb8592158088afaea0eb464cf9de1

git.kernel.org/...c/a6a9bc544b675d8b5180f2718ec985ad267b5cbf

cve.org (CVE-2026-45930)

nvd.nist.gov (CVE-2026-45930)

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