5.5

CVE-2026-53227: linux

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2026-53227DEBIAN-CVE-2026-53227CGA-4pqm-pp8g-q7p4
Published 25-06-2026Last modified 15-10-2026
Open JSON

Vulnerability summary

CVE-2026-53227 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2.5% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.13%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 37 · Related 37
MGASA-2026-0312OPENSUSE-SU-2026:21555-1SUSE-SU-2026:23066-1SUSE-SU-2026:23068-1SUSE-SU-2026:23193-1SUSE-SU-2026:23194-1

Timeline

  1. 25-06-2026
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.13%

Chance of exploitation in the next 30 days

Percentile

3%

Versus all other CVEs

30-day change

0.00 pp

From 0.13% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.13%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu168 products
  • linuxAll versions (No fix recorded) | < 5.15.0-198.208 | < 6.8.0-146.146 | < 7.0.0-31.31
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1117.124 | < 6.8.0-1066.69 | < 7.0.0-1012.12
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Chainguard13 products
  • linux-aws-6.12< 6.12.95-r0
  • linux-aws-6.18< 6.18.38-r0
  • linux-azure-6.12< 6.12.95-r0
  • linux-azure-6.18< 6.18.38-r0
  • linux-gcp-6.12< 6.12.95-r0
Linux2 products
  • linux≥ 893f139b9a6c00c097b9082a90f3041cfb3a0d20, < e248fb2e680deb2bd37bac551b72638fe4938a76 | ≥ 893f139b9a6c00c097b9082a90f3041cfb3a0d20, < 0bb5b2dc1b90aa7dd1473fc8c4d813a29255ff8d | ≥ 893f139b9a6c00c097b9082a90f3041cfb3a0d20, < 971b1b37774f13acc5add0a2843f8598446b8598 | ≥ 893f139b9a6c00c097b9082a90f3041cfb3a0d20, < 25fdf53698535fe8790237f5a8a9626791429785 | ≥ 893f139b9a6c00c097b9082a90f3041cfb3a0d20, < e3d509a1b71396e1452060dbf84a805fd1c3c549 | ≥ 893f139b9a6c00c097b9082a90f3041cfb3a0d20, < ecc55aad3390129a87106841f4b68bf3d70c9264 | ≥ 893f139b9a6c00c097b9082a90f3041cfb3a0d20, < 895d1dd9057cde1687fa0f4286d47ceed0b82997 | ≥ 893f139b9a6c00c097b9082a90f3041cfb3a0d20, < ee30dd2909d8b98619f4341c70ec8dc8e155ab02 | 3.16
  • linux_kernel≥ 3.16, < 5.10.259 | ≥ 5.11, < 5.15.210 | ≥ 5.16, < 6.1.176 | ≥ 6.2, < 6.6.143 | ≥ 6.7, < 6.12.94 | ≥ 6.13, < 6.18.36 | ≥ 6.19, < 7.0.13 | 7.1:rc1 | 7.1:rc2 | 7.1:rc3 | 7.1:rc4 | 7.1:rc5 | 7.1:rc6 | 7.1:rc7
Debian1 product
  • linux< 6.1.176-1 | < 6.12.94-1 | < 7.0.13-1

4 vendors · 184 products

References

37 links
Show all 37 references