CVE-2026-53227net: openvswitch: fix possible kfree_skb of ERR_PTR
- 5.5MediumCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 97% 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: openvswitch: fix possible kfree_skb of ERR_PTR After the patch in the "Fixes" tag, the allocation of the "reply" skb can happen either before or after locking the ovs_mutex. However, error cleanups still follow the classical reversed order, assuming "reply" is allocated before locking: it is freed after unlocking. If "reply" allocation happens after locking the mutex and it fails, "reply" is left with an ERR_PTR, and execution jumps to the correspondent cleanup stage which will try to free an invalid pointer. Fix this by setting the pointer to NULL after having saved its error value.
Timeline
ID reserved
By Linux
- 16 days later
· 16 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 · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.13% · top 97% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 893f139b9a6c00c097b9082a90f3041cfb3a0d20 – < e248fb2e680deb2bd37bac551b72638fe4938a76
- affected 893f139b9a6c00c097b9082a90f3041cfb3a0d20 – < 0bb5b2dc1b90aa7dd1473fc8c4d813a29255ff8d
- affected 893f139b9a6c00c097b9082a90f3041cfb3a0d20 – < 971b1b37774f13acc5add0a2843f8598446b8598
- affected 893f139b9a6c00c097b9082a90f3041cfb3a0d20 – < 25fdf53698535fe8790237f5a8a9626791429785
- affected 893f139b9a6c00c097b9082a90f3041cfb3a0d20 – < e3d509a1b71396e1452060dbf84a805fd1c3c549
- affected 893f139b9a6c00c097b9082a90f3041cfb3a0d20 – < ecc55aad3390129a87106841f4b68bf3d70c9264
- affected 893f139b9a6c00c097b9082a90f3041cfb3a0d20 – < 895d1dd9057cde1687fa0f4286d47ceed0b82997
- affected 893f139b9a6c00c097b9082a90f3041cfb3a0d20 – < ee30dd2909d8b98619f4341c70ec8dc8e155ab02
- affected 3.16
- unaffected < 3.16
- unaffected 5.10.259 – ≤ 5.10.*
- unaffected 5.15.210 – ≤ 5.15.*
- unaffected 6.1.176 – ≤ 6.1.*
- unaffected 6.6.143 – ≤ 6.6.*
- unaffected 6.12.94 – ≤ 6.12.*
- unaffected 6.18.36 – ≤ 6.18.*
- unaffected 7.0.13 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References9
- https://git.kernel.org/stable/c/e248fb2e680deb2bd37bac551b72638fe4938a76 (opens in a new tab)
- https://git.kernel.org/stable/c/0bb5b2dc1b90aa7dd1473fc8c4d813a29255ff8d (opens in a new tab)
- https://git.kernel.org/stable/c/971b1b37774f13acc5add0a2843f8598446b8598 (opens in a new tab)
- https://git.kernel.org/stable/c/25fdf53698535fe8790237f5a8a9626791429785 (opens in a new tab)
- https://git.kernel.org/stable/c/e3d509a1b71396e1452060dbf84a805fd1c3c549 (opens in a new tab)
- https://git.kernel.org/stable/c/ecc55aad3390129a87106841f4b68bf3d70c9264 (opens in a new tab)
- https://git.kernel.org/stable/c/895d1dd9057cde1687fa0f4286d47ceed0b82997 (opens in a new tab)
- https://git.kernel.org/stable/c/ee30dd2909d8b98619f4341c70ec8dc8e155ab02 (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html (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-2026-39318 (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-2026-53227)Record last updated .