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CVE-2026-53294mailbox: mailbox-test: don't free the reused channel
- 7.8HighCVSS base score
- 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: mailbox: mailbox-test: don't free the reused channel The RX channel can be aliased to the TX channel if it has a different MMIO. This special case needs to be handled when freeing the channels otherwise a double-free occurs.
Timeline
ID reserved
By Linux
- 17 days later
· 17 days later
Published
- 4 months later
· 4 months 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 |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.18% · top 93% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 – < fc0089f82c3e36060c2c79156bc2018bfb16b56b
- affected 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 – < 5d4f3d0f64f1016cb78b400a70b67df91fac99b5
- affected 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 – < c494a11da45ad7ec9b0ff216c3e3ace351193bb6
- affected 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 – < 3afca89fae501dbd7421e1777b5b8f033b1d98d0
- affected 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 – < 5c209299b0113e289e238fa5f2e8f00c59f76060
- affected 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 – < 82f6dcea46cf5de65c4ba7283f7c7b34de4a324d
- affected 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 – < 240c71a2aea36a1a4210f911a1c32ea88777e8e4
- affected 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 – < 88ebadbf0deefdaccdab868b44ff70a0a257f473
- affected 4.4
- unaffected < 4.4
- unaffected 5.10.258 – ≤ 5.10.*
- unaffected 5.15.209 – ≤ 5.15.*
- unaffected 6.1.175 – ≤ 6.1.*
- unaffected 6.6.141 – ≤ 6.6.*
- unaffected 6.12.91 – ≤ 6.12.*
- unaffected 6.18.33 – ≤ 6.18.*
- unaffected 7.0.10 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References8
- https://git.kernel.org/stable/c/fc0089f82c3e36060c2c79156bc2018bfb16b56b (opens in a new tab)
- https://git.kernel.org/stable/c/5d4f3d0f64f1016cb78b400a70b67df91fac99b5 (opens in a new tab)
- https://git.kernel.org/stable/c/c494a11da45ad7ec9b0ff216c3e3ace351193bb6 (opens in a new tab)
- https://git.kernel.org/stable/c/3afca89fae501dbd7421e1777b5b8f033b1d98d0 (opens in a new tab)
- https://git.kernel.org/stable/c/5c209299b0113e289e238fa5f2e8f00c59f76060 (opens in a new tab)
- https://git.kernel.org/stable/c/82f6dcea46cf5de65c4ba7283f7c7b34de4a324d (opens in a new tab)
- https://git.kernel.org/stable/c/240c71a2aea36a1a4210f911a1c32ea88777e8e4 (opens in a new tab)
- https://git.kernel.org/stable/c/88ebadbf0deefdaccdab868b44ff70a0a257f473 (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-2026-39899 (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-2026-53294)Record last updated .