CVE-2026-53227net: openvswitch: fix possible kfree_skb of ERR_PTR
Updated under an hour ago ()
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It affects Linux and 2 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
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.
- CVSS
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 893f139b9a6c00c097b9082a90f3041cfb3a0d20 before e248fb2e680deb2bd37bac551b72638fe4938a76; 893f139b9a6c00c097b9082a90f3041cfb3a0d20 builds before 0bb5b2dc1b90aa7dd1473fc8c4d813a29255ff8d; from 893f139b9a6c00c097b9082a90f3041cfb3a0d20 before 971b1b37774f13acc5add0a2843f8598446b8598; 893f139b9a6c00c097b9082a90f3041cfb3a0d20 builds before 25fdf53698535fe8790237f5a8a9626791429785; from 893f139b9a6c00c097b9082a90f3041cfb3a0d20 before e3d509a1b71396e1452060dbf84a805fd1c3c549; from 893f139b9a6c00c097b9082a90f3041cfb3a0d20 before ecc55aad3390129a87106841f4b68bf3d70c9264; from 893f139b9a6c00c097b9082a90f3041cfb3a0d20 before 895d1dd9057cde1687fa0f4286d47ceed0b82997; from 893f139b9a6c00c097b9082a90f3041cfb3a0d20 before ee30dd2909d8b98619f4341c70ec8dc8e155ab02 | CNA record |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | all versions | CISA ADP |
linux linux_kernel linux:linux_kernel | from 3.16 before 5.10.259; from 5.11 before 5.15.210; from 5.16 before 6.1.176; from 6.2 before 6.6.143; from 6.7 before 6.12.94; from 6.13 before 6.18.36; from 6.19 before 7.0.13; 7.1; and 6 more ranges | NVD |
References
- https://git.kernel.org/stable/c/e248fb2e680deb2bd37bac551b72638fe4938a76patch
- https://git.kernel.org/stable/c/0bb5b2dc1b90aa7dd1473fc8c4d813a29255ff8dpatch
- https://git.kernel.org/stable/c/971b1b37774f13acc5add0a2843f8598446b8598patch
- https://git.kernel.org/stable/c/25fdf53698535fe8790237f5a8a9626791429785patch
- https://git.kernel.org/stable/c/e3d509a1b71396e1452060dbf84a805fd1c3c549patch
- https://git.kernel.org/stable/c/ecc55aad3390129a87106841f4b68bf3d70c9264patch
- https://git.kernel.org/stable/c/895d1dd9057cde1687fa0f4286d47ceed0b82997patch
- https://git.kernel.org/stable/c/ee30dd2909d8b98619f4341c70ec8dc8e155ab02patch
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.