01 Record

CVE-2026-64531

net: openvswitch: reject oversized nested action attrs

HighPUBLISHEDCNA: Linux

CNA base score7.8 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

View raw JSON

02 Description

net: openvswitch: reject oversized nested action attrs

03 Exploitation and scoring

Exploitation: Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision: Not assessed by CISA
EPSS probability: 0.38% probability of exploitation activity in the next 30 days.
EPSS percentile: Ranks above 30.7% of scored records. A rank, not a probability.
NVD base score: 7.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD analysis status: Received. NVD last modified this record on 2026-08-22.
Red Hat severity: Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published: 2026-07-27 06:32Z1 MO AGO
Last updated: 2026-08-22 04:12Z13 DAYS AGO
Reserved: 2026-07-19
Assigning CNA: Linux
Record state: PUBLISHED
Severity: High (CVSS 7.8)
CNA CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weaknesses: No CWE assigned
Data version: 5.2
Document digest: c27b70b548703fa4ad92480cc65242a1ef8658f2f064845e464f279284883ec6

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux057dbc5b72e9fcac439cd561c3a539b8a0edeb92 to < ab855641241387db062a5e41d9ad6b8561542572, 2532adbfe917c0e71dba2650ffc6efe396314c87 to < c66bd2626c2764f23764ff0f8277f44a9cfe8349, 4b1a0ee6164c7204c68ab5a9c48c07bfe8852485 to < d573250d228401f707f4dbc09d11227a6215ee5f, e6610f9c08b4c04cf7949c10fc246c071d00e935 to < f1efff8858403191361a01269c6fe8dd7f55a385, a1e64addf3ff9257b45b78bc7d743781c3f41340 to < dbd14f736be02cfe73049bd801af89becd1a0749, a1e64addf3ff9257b45b78bc7d743781c3f41340 to < 1b41cbe05b184f8861712f0806cc0c4f5d8c6dfe, a1e64addf3ff9257b45b78bc7d743781c3f41340 to < 3f1f755366687d051174739fb99f7d560202f60b, 6b099d285d7ed324494b6d684f377aa103856118, 5.15.180 to < 5.15.212, 6.1.132 to < 6.1.178, 6.6.84 to < 6.6.145, 6.12.20 to < 6.12.97, 6.13.8 to < 6.14, 6.14—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/ab855641241387db062a5e41d9ad6b8561542572
git.kernel.orghttps://git.kernel.org/stable/c/c66bd2626c2764f23764ff0f8277f44a9cfe8349
git.kernel.orghttps://git.kernel.org/stable/c/d573250d228401f707f4dbc09d11227a6215ee5f
git.kernel.orghttps://git.kernel.org/stable/c/f1efff8858403191361a01269c6fe8dd7f55a385
git.kernel.orghttps://git.kernel.org/stable/c/dbd14f736be02cfe73049bd801af89becd1a0749
git.kernel.orghttps://git.kernel.org/stable/c/1b41cbe05b184f8861712f0806cc0c4f5d8c6dfe
git.kernel.orghttps://git.kernel.org/stable/c/3f1f755366687d051174739fb99f7d560202f60b
www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/07/28/8
www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/07/31/17
www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/08/01/1
www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/08/01/3
www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/08/22/1

01 Record index

CVE-2026-64531

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2026-64531

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References