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Description

In the Linux kernel, the following vulnerability has been resolved: net/sched: act_api: avoid dereferencing ERR_PTR in tcf_idrinfo_destroy syzbot reported a crash in tc_act_in_hw() during netns teardown where tcf_idrinfo_destroy() passed an ERR_PTR(-EBUSY) value as a tc_action pointer, leading to an invalid dereference. Guard against ERR_PTR entries when iterating the action IDR so teardown does not call tc_act_in_hw() on an error pointer.

PUBLISHED Reserved 2026-01-13 | Published 2026-01-23 | Updated 2026-02-09 | Assigner Linux

Product status

Default status
unaffected

84a7d6797e6a03705e6b48c613fa424662049d87 (git) before 67550a1130b647bb0d093c9c0a810c69aa6a30a8
affected

84a7d6797e6a03705e6b48c613fa424662049d87 (git) before adb25a46dc0a43173f5ea5f5f58fc8ba28970c7c
affected

Default status
affected

6.17
affected

Any version before 6.17
unaffected

6.18.6 (semver)
unaffected

6.19 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/67550a1130b647bb0d093c9c0a810c69aa6a30a8

git.kernel.org/...c/adb25a46dc0a43173f5ea5f5f58fc8ba28970c7c

cve.org (CVE-2026-22987)

nvd.nist.gov (CVE-2026-22987)

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