CVE-2026-98015net/mlx5: E-Switch: fix use-after-free in mlx5_eswitch_termtbl_put
- —Not scoredno CVSS score yet
- 0.18%Exploitation in 30 daysEPSS · top 93% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
Published
- 24 days later
· 24 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.18% · top 93% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected 10caabdaad5ace85577a453da97d1f8d3b944427 – < e3ee194a790896fa92fea20b5385a354be2f2c12
- affected 10caabdaad5ace85577a453da97d1f8d3b944427 – < b1398c9dfb5d3d4faaf6905ff7d98110a5d2c797
- affected 10caabdaad5ace85577a453da97d1f8d3b944427 – < 92f581cac93a71723456ac79ef54d9f60a251b42
- affected 10caabdaad5ace85577a453da97d1f8d3b944427 – < a5833fdf53350b8b95a558fcf0056ddb1c0fe154
- affected 10caabdaad5ace85577a453da97d1f8d3b944427 – < 304ea40ef4561671503c36e47da44a0a31b71e36
- affected 10caabdaad5ace85577a453da97d1f8d3b944427 – < e393789e92310d7c66f57c876101779c90816a12
- affected 10caabdaad5ace85577a453da97d1f8d3b944427 – < 18b2969073879b9cce24e1a78b118bdad54518d1
- affected 10caabdaad5ace85577a453da97d1f8d3b944427 – < 7ee07f601f8f507c9faf25c68a49396ab8950596
- affected 5.3
- unaffected < 5.3
- unaffected 5.10.271 – ≤ 5.10.*
- unaffected 5.15.222 – ≤ 5.15.*
- unaffected 6.1.189 – ≤ 6.1.*
- unaffected 6.6.158 – ≤ 6.6.*
- unaffected 6.12.111 – ≤ 6.12.*
- unaffected 6.18.53 – ≤ 6.18.*
- unaffected 7.2.7 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References8
- https://git.kernel.org/stable/c/e3ee194a790896fa92fea20b5385a354be2f2c12 (opens in a new tab)
- https://git.kernel.org/stable/c/b1398c9dfb5d3d4faaf6905ff7d98110a5d2c797 (opens in a new tab)
- https://git.kernel.org/stable/c/92f581cac93a71723456ac79ef54d9f60a251b42 (opens in a new tab)
- https://git.kernel.org/stable/c/a5833fdf53350b8b95a558fcf0056ddb1c0fe154 (opens in a new tab)
- https://git.kernel.org/stable/c/304ea40ef4561671503c36e47da44a0a31b71e36 (opens in a new tab)
- https://git.kernel.org/stable/c/e393789e92310d7c66f57c876101779c90816a12 (opens in a new tab)
- https://git.kernel.org/stable/c/18b2969073879b9cce24e1a78b118bdad54518d1 (opens in a new tab)
- https://git.kernel.org/stable/c/7ee07f601f8f507c9faf25c68a49396ab8950596 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-86668 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://cveledger.app/cve/CVE-2026-98015)Record last updated .