CVE Explorer

CVE-2026-64073

In the Linux kernel, the following vulnerability has been resolved: irq_work: Fix use-after-free in irq_work_single() on PREEMPT_RT On PREEMPT_RT, non-HARD irq_work runs in per-CPU kthreads via run_irq_workd(), so irq_work_sync() uses rcuwait() to wait for BUSY==0. After irq_work_single() clears BUSY via atomic_cmpxchg(), it still dereferences @work for irq_work_is_hard() and rcuwait_wake_up(). An irq_work_sync() caller on another CPU that enters after BUSY is cleared can observe BUSY==0 imm

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:414d139c229db6910fbcab082da3146e67b05a17f09ea9df4e13f5f6811ffd64

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"defaultStatus":"affected","product":"Linux","programFiles":["kernel/irq_work.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.16"},{"lessThan":"5.16","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.175","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.142","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.92","versionType":"semver"},{"lessThanOrEqua…

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:59becce2968ceebf53cc356c0325a3acba5ae8293eca8d771e3118689d5d5685 · sha256:79844ae49471f6c2… · /containers/cna/affected/1

{"defaultStatus":"unaffected","product":"Linux","programFiles":["kernel/irq_work.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"2dc79362302922cb18f35e262712b5e58de65442","status":"affected","version":"810979682ccc98dbd83f341c18a2e556c30a7164","versionType":"git"},{"lessThan":"eef4f71b46a9929ac33e968538c9dd5d96a02460","status":"affected","version":"810979682ccc98dbd83f341c18a2e556c30a7164","versionType":"git"},{"lessThan":"684a78183c54c23e70d1cba320f7fc184604210b","status":"affected","version":"810979682ccc98dbd83f341c18a2…

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:59becce2968ceebf53cc356c0325a3acba5ae8293eca8d771e3118689d5d5685 · sha256:79844ae49471f6c2… · /containers/cna/affected/0

Affected products and versions

2 source assertions

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:59becce2968ceebf53cc356c0325a3acba5ae8293eca8d771e3118689d5d5685 · sha256:79844ae49471f6c2… · /containers/cna/affected/1

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:59becce2968ceebf53cc356c0325a3acba5ae8293eca8d771e3118689d5d5685 · sha256:79844ae49471f6c2… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:59becce2968ceebf53cc356c0325a3acba5ae8293eca8d771e3118689d5d5685 · sha256:79844ae49471f6c2… · /containers/cna/metrics/0/cvssV3_1

Source references

6 source assertions

{"url":"https://git.kernel.org/stable/c/18c0456ea2615b1a743a6db739c74411c3b42bc6"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:59becce2968ceebf53cc356c0325a3acba5ae8293eca8d771e3118689d5d5685 · sha256:79844ae49471f6c2… · /containers/cna/references/3

{"url":"https://git.kernel.org/stable/c/2dc79362302922cb18f35e262712b5e58de65442"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:59becce2968ceebf53cc356c0325a3acba5ae8293eca8d771e3118689d5d5685 · sha256:79844ae49471f6c2… · /containers/cna/references/0

{"url":"https://git.kernel.org/stable/c/684a78183c54c23e70d1cba320f7fc184604210b"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:59becce2968ceebf53cc356c0325a3acba5ae8293eca8d771e3118689d5d5685 · sha256:79844ae49471f6c2… · /containers/cna/references/2

{"url":"https://git.kernel.org/stable/c/81b582784518196eff1050212a046bc29d3a05dd"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:59becce2968ceebf53cc356c0325a3acba5ae8293eca8d771e3118689d5d5685 · sha256:79844ae49471f6c2… · /containers/cna/references/4

{"url":"https://git.kernel.org/stable/c/91840be8f710370607f949a627e070896faeddb8"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:59becce2968ceebf53cc356c0325a3acba5ae8293eca8d771e3118689d5d5685 · sha256:79844ae49471f6c2… · /containers/cna/references/5

{"url":"https://git.kernel.org/stable/c/eef4f71b46a9929ac33e968538c9dd5d96a02460"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:59becce2968ceebf53cc356c0325a3acba5ae8293eca8d771e3118689d5d5685 · sha256:79844ae49471f6c2… · /containers/cna/references/1

Attribution and limitations

CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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