CVE-2026-98031 (GCVE-0-2026-98031)

Vulnerability from cvelistv5 – Published: 2026-09-25 10:23 – Updated: 2026-09-25 10:23
VLAI
Title
nexthop: Initialize extack in remove_nh_grp_entry()
Summary
In the Linux kernel, the following vulnerability has been resolved: nexthop: Initialize extack in remove_nh_grp_entry() remove_nh_grp_entry() prints the extack message when a listener fails to replace the reduced nexthop group. However, extack is not initialized and listeners are not required to set a message when returning an error. Neither netdevsim nor mlxsw do so when an allocation fails, resulting in the dereference of an uninitialized stack pointer. Fix by zero-initializing extack, as was done in commit 6347c5314cee ("nexthop: initialize extack in nh_res_bucket_migrate()").
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 833a1065eeb14437a9a0dfa9dad06ea09894e0b5 , < 030c878eaedf0449e2b5401a0a0146d0afcc645e (git)
Affected: 833a1065eeb14437a9a0dfa9dad06ea09894e0b5 , < d643cea4248668dc493c513aa7cbc6505eb1a4a9 (git)
Affected: 833a1065eeb14437a9a0dfa9dad06ea09894e0b5 , < d80677ad7aa5bebfccfd58caa4852b65abe70561 (git)
Affected: 833a1065eeb14437a9a0dfa9dad06ea09894e0b5 , < 5bd9e4e7cdaa03879e9b73b12ab52cceb1edd55b (git)
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Linux Linux Affected: 5.11
Unaffected: 0 , < 5.11 (semver)
Unaffected: 6.12.111 , ≤ 6.12.* (semver)
Unaffected: 6.18.53 , ≤ 6.18.* (semver)
Unaffected: 7.2.7 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc3 , ≤ * (original_commit_for_fix)
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}



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