9.8

CVE-2026-53055: linux Use After Free

CVSS: 9.8v3.1CriticalAnalyzed
AliasesUBUNTU-CVE-2026-53055DEBIAN-CVE-2026-53055
Published 24-06-2026Last modified 05-08-2026
Open JSON

Vulnerability summary

CVE-2026-53055 is a critical (CVSS 9.8) Use After Free vulnerability in linux. EPSS estimates a 0.43% chance of exploitation in the next 30 days, higher than 35.8% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.43%
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 13 · Related 13
USN-8566-1USN-8568-1USN-8569-1USN-8593-1USN-8603-1USN-8618-1

Timeline

  1. 24-06-2026
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: crypto: hisilicon/sec2 - prevent req used-after-free for sec During packet transmission, if the system is under heavy load, the hardware might complete processing the packet and free the request memory (req) before the transmission function finishes. If the software subsequently accesses this req, a use-after-free error will occur. The qp_ctx memory exists throughout the packet sending process, so replace the req with the qp_ctx.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.43%

Chance of exploitation in the next 30 days

Percentile

36%

Versus all other CVEs

30-day change

0.00 pp

From 0.43% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.43%

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

Ubuntu118 products
  • linuxAll versions (No fix recorded) | < 7.0.0-28.28
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 7.0.0-1009.9
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ f0ae287c50455f7be0d8dd45a803d403c7aa4d2e, < b375c3c7209cc59e40e97998aa9bc768369cca0e | ≥ f0ae287c50455f7be0d8dd45a803d403c7aa4d2e, < ad73563f3a1edbfddf2724136c6a15826b354e18 | ≥ f0ae287c50455f7be0d8dd45a803d403c7aa4d2e, < 67b53a660e6bf0da2fa8d8872e897a14d8059eaf | 6.17
  • linux_kernel≥ 6.17, < 6.18.33 | ≥ 6.19, < 7.0.10
Debian1 product
  • linux< 7.0.10-1

3 vendors · 121 products

References

20 links
Show all 20 references