bpf: Reject sleepable kprobe_multi programs at attach time

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Summary

CVECVE-2026-43010
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-01 15:16:44 UTC
Updated2026-05-01 15:24:14 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: bpf: Reject sleepable kprobe_multi programs at attach time kprobe.multi programs run in atomic/RCU context and cannot sleep. However, bpf_kprobe_multi_link_attach() did not validate whether the program being attached had the sleepable flag set, allowing sleepable helpers such as bpf_copy_from_user() to be invoked from a non-sleepable context. This causes a "sleeping function called from invalid context" splat: BUG: sleeping function called from invalid context at ./include/linux/uaccess.h:169 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 1787, name: sudo preempt_count: 1, expected: 0 RCU nest depth: 2, expected: 0 Fix this by rejecting sleepable programs early in bpf_kprobe_multi_link_attach(), before any further processing.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 0dcac272540613d41c05e89679e4ddb978b612f1 dc9a060d76c12b23c5f378ee115d5e5d03d8bbf3 git Not specified
CNA Linux Linux affected 0dcac272540613d41c05e89679e4ddb978b612f1 f952157e695fd434bdc05af63a703bb082a78717 git Not specified
CNA Linux Linux affected 0dcac272540613d41c05e89679e4ddb978b612f1 eb7024bfcc5f68ed11ed9dd4891a3073c15f04a8 git Not specified
CNA Linux Linux affected 5.18 Not specified
CNA Linux Linux unaffected 5.18 semver Not specified
CNA Linux Linux unaffected 6.18.22 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.12 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/dc9a060d76c12b23c5f378ee115d5e5d03d8bbf3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/eb7024bfcc5f68ed11ed9dd4891a3073c15f04a8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f952157e695fd434bdc05af63a703bb082a78717 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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