dibs: initialise dibs->lock in dibs_dev_alloc()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-74617
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-22 16:16:34 UTC
Updated2026-08-22 16:16:34 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: dibs: initialise dibs->lock in dibs_dev_alloc() dibs->lock is initialised by dibs_dev_add(), but a dibs device can already take interrupts before that call: ism_probe() runs ism_dev_init(), and hence request_irq(), before it calls dibs_dev_add(). No client can have registered a dmb at that point, so no dmb interrupt can occur, but a GID event interrupt can, and ism_handle_irq() takes dibs->lock unconditionally on entry, before it inspects anything else. Initialise the lock in dibs_dev_alloc() instead, so that it is valid as soon as a driver can publish the device to its interrupt handler.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected cc21191b584c6f7836b0f10774f8278b7cbfba10 fe79571f40434b257d68cbfb7b3ae93a794d8a11 git Not specified
CNA Linux Linux affected cc21191b584c6f7836b0f10774f8278b7cbfba10 2926031acba100d0c18fcfaa7a2ed29609318848 git Not specified
CNA Linux Linux affected cc21191b584c6f7836b0f10774f8278b7cbfba10 c27e360545373b7aee9862a5beef3b9fb3df0c25 git Not specified
CNA Linux Linux affected 6.18 Not specified
CNA Linux Linux unaffected 6.18 semver Not specified
CNA Linux Linux unaffected 6.18.45 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.9 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/c27e360545373b7aee9862a5beef3b9fb3df0c25 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2926031acba100d0c18fcfaa7a2ed29609318848 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/fe79571f40434b257d68cbfb7b3ae93a794d8a11 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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