RDMA/erdma: Fix CEQ tasklet use-after-free on removal
Summary
| CVE | CVE-2026-92514 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-17 17:17:54 UTC |
| Updated | 2026-09-17 17:17:54 UTC |
| Description | In the Linux kernel, the following vulnerability has been resolved: RDMA/erdma: Fix CEQ tasklet use-after-free on removal Each CEQ interrupt handler only schedules eqc->tasklet. The tasklet calls erdma_ceq_completion_handler(), which reads the DMA-coherent EQ ring through get_next_valid_eqe() and updates eq->dbrec through notify_eq(). erdma_ceqs_uninit() frees each CEQ IRQ and then destroys its EQ. free_irq() prevents another hard IRQ and waits for an in-flight handler, but it does not drain a tasklet that the handler already scheduled. The tasklet can therefore access eq->qbuf or eq->dbrec after erdma_eq_destroy() frees them. Clearing ceq_cb->ready does not synchronize with a tasklet that already passed the check at the start of erdma_ceq_completion_handler(). Kill the tasklet after free_irq(), when no handler can schedule it again, and before erdma_ceq_uninit_one() releases the EQ buffers. |
Risk And Classification
EPSS: 0.002050000 probability, percentile 0.109400000 (date 2026-09-18)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected f2a0a630b953451a59a2612ad8c29246638f0a38 0e8b78dabb1f156db05ffe74c6eae861167c7c21 git | Not specified |
| CNA | Linux | Linux | affected f2a0a630b953451a59a2612ad8c29246638f0a38 6e129c1310abfa786a510cc63e69c5ef12349048 git | Not specified |
| CNA | Linux | Linux | affected f2a0a630b953451a59a2612ad8c29246638f0a38 f738c0a372d36a10dfae6dc357717c13b2aa72f4 git | Not specified |
| CNA | Linux | Linux | affected f2a0a630b953451a59a2612ad8c29246638f0a38 a60c36d8d17f1b86705523d5eb6d290df28831e5 git | Not specified |
| CNA | Linux | Linux | affected f2a0a630b953451a59a2612ad8c29246638f0a38 61a25b8d333e1eb2a189881d516f8d5194e26840 git | Not specified |
| CNA | Linux | Linux | affected f2a0a630b953451a59a2612ad8c29246638f0a38 0ca79979384f031d710c4b3bae065dcb5d95aca3 git | Not specified |
| CNA | Linux | Linux | affected 6.0 | Not specified |
| CNA | Linux | Linux | unaffected 6.0 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.188 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.157 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.110 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.52 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2.6 7.2.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.3-rc1 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/0ca79979384f031d710c4b3bae065dcb5d95aca3 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/61a25b8d333e1eb2a189881d516f8d5194e26840 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/f738c0a372d36a10dfae6dc357717c13b2aa72f4 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/a60c36d8d17f1b86705523d5eb6d290df28831e5 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/0e8b78dabb1f156db05ffe74c6eae861167c7c21 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/6e129c1310abfa786a510cc63e69c5ef12349048 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.