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CVE-2026-98031

nexthop: Initialize extack in remove_nh_grp_entry()

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.15.222, 6.1.189, 6.6.158, 6.12.111, 6.18.53, and 1 more
None on Exploit-DB, Metasploit or GitHub

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()").

Timeline

  1. CVE published
  2. Record last updated

Affected versions

  • Linux Linux

    From 833a1065eeb14437a9a0dfa9dad06ea09894e0b5 · fixed in 35d9ec61466109ef0c2de87067338d929f629527; From 833a1065eeb14437a9a0dfa9dad06ea09894e0b5 · fixed in 704319510af2179cf03955747d714ab291075c25; From 833a1065eeb14437a9a0dfa9dad06ea09894e0b5 · fixed in 17acbcd4c5a6ca3dd3f9e52eb203c9175bde609a; From 833a1065eeb14437a9a0dfa9dad06ea09894e0b5 · fixed in 030c878eaedf0449e2b5401a0a0146d0afcc645e; From 833a1065eeb14437a9a0dfa9dad06ea09894e0b5 · fixed in d643cea4248668dc493c513aa7cbc6505eb1a4a9; From 833a1065eeb14437a9a0dfa9dad06ea09894e0b5 · fixed in d80677ad7aa5bebfccfd58caa4852b65abe70561; From 833a1065eeb14437a9a0dfa9dad06ea09894e0b5 · fixed in 5bd9e4e7cdaa03879e9b73b12ab52cceb1edd55b

  • Linux Linux

    5.11

  • KernelLinux

    From 5.11.0 · fixed in 5.15.222; From 5.16.0 · fixed in 6.1.189; From 6.2.0 · fixed in 6.6.158; From 6.7.0 · fixed in 6.12.111; From 6.13.0 · fixed in 6.18.53; From 6.19.0 · fixed in 7.2.7

References 7

git.kernel.org