CVE-2026-89636smb: client: clear ce->tgthint in free_tgts()
- 9.8CriticalCVSS base score
- 0.66%Exploitation in 30 daysEPSS · top 48% 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: smb: client: clear ce->tgthint in free_tgts() When free_tgts() frees all structures in ce->tlist, ce->tgthint is left pointing to one of the freed cache_dfs_tgt structures. If ce->tgthint is not reset before it is used later, it results in a use-after-free. Set ce->tgthint to NULL in free_tgts() after the elements are freed to reflect that no elements remain.
Timeline
ID reserved
By Linux
Published
- 38 days later
· 38 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
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.66% · top 48% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
- affected 54be1f6c1c37498bba557049df646cc239fa37e3 – < 14f60e959b5ac813715ff72e127beb3584ddabf6
- affected 54be1f6c1c37498bba557049df646cc239fa37e3 – < 3ff9462bb7a06d8d32a1dc02d39580b078ec9e55
- affected 54be1f6c1c37498bba557049df646cc239fa37e3 – < 7507bd1885643d0461a6017767492450af1ce2a3
- affected 54be1f6c1c37498bba557049df646cc239fa37e3 – < 9ab46a13798a61d9d020b01d4e57efdabe6624fa
- affected 54be1f6c1c37498bba557049df646cc239fa37e3 – < 5baab40404a9393bcc0b7b8f1950bf2c307e0984
- affected 54be1f6c1c37498bba557049df646cc239fa37e3 – < b1b741cf8e7ce1b91d937e23decd3d3358748700
- affected 5.0
- unaffected < 5.0
- unaffected 6.1.188 – ≤ 6.1.*
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.109 – ≤ 6.12.*
- unaffected 6.18.50 – ≤ 6.18.*
- unaffected 7.2.4 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References6
- https://git.kernel.org/stable/c/14f60e959b5ac813715ff72e127beb3584ddabf6 (opens in a new tab)
- https://git.kernel.org/stable/c/3ff9462bb7a06d8d32a1dc02d39580b078ec9e55 (opens in a new tab)
- https://git.kernel.org/stable/c/7507bd1885643d0461a6017767492450af1ce2a3 (opens in a new tab)
- https://git.kernel.org/stable/c/9ab46a13798a61d9d020b01d4e57efdabe6624fa (opens in a new tab)
- https://git.kernel.org/stable/c/5baab40404a9393bcc0b7b8f1950bf2c307e0984 (opens in a new tab)
- https://git.kernel.org/stable/c/b1b741cf8e7ce1b91d937e23decd3d3358748700 (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-2026-76548 (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)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-89636)Record last updated .