7.8

CVE-2026-53270: linux Use After Free

CVSS: 7.8v3.1HighModified
AliasesUBUNTU-CVE-2026-53270DEBIAN-CVE-2026-53270CGA-4rh3-vhf8-v6xq
Published 25-06-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-53270 is a high (CVSS 7.8) Use After Free vulnerability in linux. EPSS estimates a 0.12% chance of exploitation in the next 30 days, higher than 1.7% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.12%
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 40 · Related 38
MGASA-2026-0312OPENSUSE-SU-2026:21555-1RHSA-2026:75746RHSA-2026:75747SUSE-SU-2026:23066-1SUSE-SU-2026:23068-1

Timeline

  1. 25-06-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: ipvs: clear the svc scheduler ptr early on edit ip_vs_edit_service() while unbinding the old scheduler clears the svc->scheduler ptr after the scheduler module initiates RCU callbacks. This can cause packets to use the old scheduler at the time when svc->sched_data is already freed after RCU grace period. Fix it by clearing the ptr early in ip_vs_unbind_scheduler(), before the done_service method schedules any RCU callbacks. Also, if the new scheduler fails to initialize when replacing the old scheduler, try to restore the old scheduler while still returning the error code.

CVSS metrics

6 scores · 5 sources · 2 versions

EPSS trend

Probability

0.12%

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
0.12%

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)
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≥ 05f00505a89acd21f5d0d20f5797dfbc4cf85243, < d10730a1f2caf08088e0db1b19b242f3e6fa5f06 | ≥ 05f00505a89acd21f5d0d20f5797dfbc4cf85243, < e4feec3174036ba772006be74beee0efa09a9eb8 | ≥ 05f00505a89acd21f5d0d20f5797dfbc4cf85243, < 7d4f5004511757e3984901ffb412fcf858d80ed5 | ≥ 05f00505a89acd21f5d0d20f5797dfbc4cf85243, < c6376b9b1b4d2bad638256b1b3588e073344ae69 | ≥ 05f00505a89acd21f5d0d20f5797dfbc4cf85243, < 14e4689c113b4c06af1069364ade24fdd7055f33 | ≥ 05f00505a89acd21f5d0d20f5797dfbc4cf85243, < 25918720ba97f974a4f8d433b5a0132c5b43f6f3 | ≥ 05f00505a89acd21f5d0d20f5797dfbc4cf85243, < 19a9493faa4bf3c7bd0a386f30b60b1bb4a3da03 | ≥ 05f00505a89acd21f5d0d20f5797dfbc4cf85243, < 193989cc6d80dd8e0460fb3992e69fa03bf0ff9b | c803fddd2a95a70873c68dbff42d4c59fd2e674e | 4ec8fb23158797affae7993c15beba080488482f | ≥ 3.18.23, < 3.19 | ≥ 4.1.11, < 4.2 | 4.2
  • linux_kernel≥ 3.18.23, < 3.19 | ≥ 4.1.11, < 4.2 | ≥ 4.2.1, < 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 | 4.2 | 4.2:rc5 | 4.2:rc6 | 4.2:rc7 | 4.2:rc8 | 7.1:rc1 | 7.1:rc2 | 7.1:rc3 | 7.1:rc4 | 7.1:rc5 | 7.1:rc6
Debian1 product
  • linux< 6.1.176-1 | < 6.12.94-1 | < 7.0.13-1

4 vendors · 177 products

References

39 links
Show all 39 references