5.5

CVE-2026-53236: linux

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2026-53236DEBIAN-CVE-2026-53236CGA-25fg-2g6x-j96v
Published 25-06-2026Last modified 15-10-2026
Open JSON

Vulnerability summary

CVE-2026-53236 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% 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 31 · Related 31
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: tcp: restrict SO_ATTACH_FILTER to priv users This patch restricts the use of SO_ATTACH_FILTER (cBPF) on TCP sockets to users with CAP_NET_ADMIN capability. This blocks potential side-channel attack where an unprivileged application attaches a filter to leak TCP sequence/acknowledgment numbers.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.13%

Chance of exploitation in the next 30 days

Percentile

2%

Versus all other CVEs

30-day change

0.00 pp

From 0.12% 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

No weakness data has been published for this record.

Affected systems

Ubuntu168 products
  • linuxAll versions (No fix recorded) | < 6.8.0-146.146 | < 7.0.0-31.31
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 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)
Chainguard6 products
  • linux-azure-6.18< 6.18.38-r0
  • linux-gcp-6.18< 6.18.38-r0
  • linux-gcp-6.18-bootc-boot-installed< 6.18.38-r0
  • linux-qemu-6.18< 6.18.38-r0
  • linux-qemu-6.18-bootc-boot-installed< 6.18.38-r0
Linux2 products
  • linux≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 3747de241a66ef2c7032d2cc2b826a47c5fa0f6a | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < ecfe9171b26ae3eed0cd8bab7a943e9e2c9e51ba | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 82b3e7ce10c53fc12aab8904745603efc74f8c07 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < ede69b8f6670600e534591664584f810d7c385f9 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < c68517a3e18e20997808821c5559d0cba4d776c1 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 5d39580f68e6ddeedd15e587282207489dfb3da2 | 2.6.12
  • linux_kernel≥ 2.6.12.1, < 6.1.176 | ≥ 6.2, < 6.6.143 | ≥ 6.7, < 6.12.94 | ≥ 6.13, < 6.18.36 | ≥ 6.19, < 7.0.13 | 2.6.12 | 2.6.12:rc2 | 2.6.12:rc3 | 2.6.12:rc4 | 2.6.12:rc5 | 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 · 177 products

References

31 links
Show all 31 references