5.5

CVE-2026-23133: linux Use After Free

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2026-23133DEBIAN-CVE-2026-23133
Published 14-02-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-23133 is a medium (CVSS 5.5) Use After Free vulnerability in linux. EPSS estimates a 0.14% chance of exploitation in the next 30 days, higher than 3.2% 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
0.14%
0%100%
Low · +0.02 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-2026-0097MGASA-2026-0098OPENSUSE-SU-2026:20416-1SUSE-SU-2026:0962-1SUSE-SU-2026:1081-1SUSE-SU-2026:20667-1

Timeline

  1. 14-02-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: ath10k: fix dma_free_coherent() pointer dma_alloc_coherent() allocates a DMA mapped buffer and stores the addresses in XXX_unaligned fields. Those should be reused when freeing the buffer rather than the aligned addresses.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.14%

Chance of exploitation in the next 30 days

Percentile

3%

Versus all other CVEs

30-day change

+0.02 pp

From 0.13% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.14%

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

Ubuntu152 products
  • linuxAll versions (No fix recorded) | < 5.15.0-176.186 | < 6.8.0-117.117
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1105.112 | < 6.8.0-1055.58
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 2a1e1ad3fd37a632b61f50e73dafddb4b0fa57f1, < e2dda298ef809aa201ea7c0904c4d064f6c497cb | ≥ 2a1e1ad3fd37a632b61f50e73dafddb4b0fa57f1, < fc8da65f9fe1bc6802f8240b342cfff4f5c7e841 | ≥ 2a1e1ad3fd37a632b61f50e73dafddb4b0fa57f1, < b0ad924332a96550a84b8c0ae5483e7042d65fa9 | ≥ 2a1e1ad3fd37a632b61f50e73dafddb4b0fa57f1, < 1928851334ecfd6e0d663121ab69ac639d4217a6 | ≥ 2a1e1ad3fd37a632b61f50e73dafddb4b0fa57f1, < 5d6fa4d2c9799c09389588da5118a72d97d87e92 | ≥ 2a1e1ad3fd37a632b61f50e73dafddb4b0fa57f1, < 07f363f305793baecad41816f73056252f3df61e | ≥ 2a1e1ad3fd37a632b61f50e73dafddb4b0fa57f1, < 9282a1e171ad8d2205067e8ec3bbe4e3cef4f29f | 4.16
  • linux_kernel≥ 4.16, < 5.10.249 | ≥ 5.11, < 5.15.199 | ≥ 5.16, < 6.1.162 | ≥ 6.2, < 6.6.122 | ≥ 6.7, < 6.12.68 | ≥ 6.13, < 6.18.8 | 6.19:rc1 | 6.19:rc2 | 6.19:rc3 | 6.19:rc4 | 6.19:rc5 | 6.19:rc6
Debian1 product
  • linux< 6.1.162-1 | < 6.12.69-1 | < 6.18.8-1

3 vendors · 155 products

References

40 links
Show all 40 references