net/mlx5: E-Switch: fix use-after-free in mlx5_eswitch_termtbl_put
Summary
| CVE | CVE-2026-98015 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-25 11:17:29 UTC |
| Updated | 2026-10-03 11:18:24 UTC |
| Description | In the Linux kernel, the following vulnerability has been resolved: net/mlx5: E-Switch: fix use-after-free in mlx5_eswitch_termtbl_put In mlx5_eswitch_termtbl_put(), the zero-ref cleanup check reads tt->ref_count after termtbl_mutex has been released. Two concurrent callers on the same mlx5_termtbl_handle race: one decrements ref_count to zero, removes the hash entry, and calls kfree(tt) while the other has already dropped the mutex and is about to evaluate if (!tt->ref_count), producing a use-after-free. Fix this by capturing the result of the decrement into a stack-local last variable before dropping the mutex. The cleanup decision is now made entirely under termtbl_mutex, and tt is not touched after kfree. |
Risk And Classification
EPSS: 0.001760000 probability, percentile 0.065330000 (date 2026-10-05)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 10caabdaad5ace85577a453da97d1f8d3b944427 e3ee194a790896fa92fea20b5385a354be2f2c12 git | Not specified |
| CNA | Linux | Linux | affected 10caabdaad5ace85577a453da97d1f8d3b944427 b1398c9dfb5d3d4faaf6905ff7d98110a5d2c797 git | Not specified |
| CNA | Linux | Linux | affected 10caabdaad5ace85577a453da97d1f8d3b944427 92f581cac93a71723456ac79ef54d9f60a251b42 git | Not specified |
| CNA | Linux | Linux | affected 10caabdaad5ace85577a453da97d1f8d3b944427 a5833fdf53350b8b95a558fcf0056ddb1c0fe154 git | Not specified |
| CNA | Linux | Linux | affected 10caabdaad5ace85577a453da97d1f8d3b944427 304ea40ef4561671503c36e47da44a0a31b71e36 git | Not specified |
| CNA | Linux | Linux | affected 10caabdaad5ace85577a453da97d1f8d3b944427 e393789e92310d7c66f57c876101779c90816a12 git | Not specified |
| CNA | Linux | Linux | affected 10caabdaad5ace85577a453da97d1f8d3b944427 18b2969073879b9cce24e1a78b118bdad54518d1 git | Not specified |
| CNA | Linux | Linux | affected 10caabdaad5ace85577a453da97d1f8d3b944427 7ee07f601f8f507c9faf25c68a49396ab8950596 git | Not specified |
| CNA | Linux | Linux | affected 5.3 | Not specified |
| CNA | Linux | Linux | unaffected 5.3 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.271 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.222 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.189 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.158 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.111 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.53 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2.7 7.2.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.3-rc3 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/a5833fdf53350b8b95a558fcf0056ddb1c0fe154 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/e3ee194a790896fa92fea20b5385a354be2f2c12 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/304ea40ef4561671503c36e47da44a0a31b71e36 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/b1398c9dfb5d3d4faaf6905ff7d98110a5d2c797 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/e393789e92310d7c66f57c876101779c90816a12 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/92f581cac93a71723456ac79ef54d9f60a251b42 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/18b2969073879b9cce24e1a78b118bdad54518d1 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/7ee07f601f8f507c9faf25c68a49396ab8950596 | 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.