5.5

CVE-2026-53291: linux NULL Pointer Dereference

CVSS: 5.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-53291DEBIAN-CVE-2026-53291
Published 26-06-2026Last modified 26-06-2026
Open JSON

Vulnerability summary

CVE-2026-53291 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.12% chance of exploitation in the next 30 days, higher than 1.8% 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
0.12%
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 48 · Related 48
OPENSUSE-SU-2026:21910-1SUSE-SU-2026:23193-1SUSE-SU-2026:23194-1SUSE-SU-2026:23241-1SUSE-SU-2026:23244-1SUSE-SU-2026:23881-1

Timeline

  1. 26-06-2026
    PublishedVulnerability first disclosed.

Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: hda/conexant: Fix missing error check for jack detection In cx_probe(), the return value of snd_hda_jack_detect_enable_callback() is ignored. This function returns a pointer, and if it fails (e.g., due to memory allocation failure), it returns an error pointer which must be checked using IS_ERR(). If the registration fails, the driver continues to probe, but the jack detection callback will not be registered. This can lead to a kernel crash later when the driver attempts to handle jack events or accesses the uninitialized structure. Check the return value using IS_ERR() and propagate the error via PTR_ERR() to the probe caller.

CVSS metrics

3 scores · 3 sources · 1 version

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 21-09-2026

21-09-202621-10-2026
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

Ubuntu154 products
  • linux< 5.15.0-186.196 | < 6.8.0-136.136 | All versions (No fix recorded) | < 7.0.0-28.28
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1112.119 | < 6.8.0-1061.64 | All 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≥ f13b8cb5a6920ad98b751d3134686f29810577d4, < 49c2c5924552e1d2f8b635dee663abebbb7cf63b | ≥ 2cb659ef0ac744545499e7c37665b276d9e405da, < a2a33e87a2ffce3046c574d24eec4390c27c9365 | ≥ 24d748413cc4e1d97074bae1f335d32d30912f10, < d68f753d89f4ef6e410d7e8b7e8ab2fdde921b80 | ≥ 7aeb259086487417f0fecf66e325bee133e8813a, < dd110cc00cf854a8ecd8d003127a4178c28574ea | ≥ 7aeb259086487417f0fecf66e325bee133e8813a, < f837c7b85143a7c54140ff41ad5c076b73cd9933 | ≥ 7aeb259086487417f0fecf66e325bee133e8813a, < 1da5c73f3793b224696617a2a21def7500ba18d6 | ≥ 7aeb259086487417f0fecf66e325bee133e8813a, < b0e2333a231107adedd38c6fcfe1adc6162716fc | 4a28302b2c681e3cf85e3b41231fff363c4c6a0e | ≥ 5.15.149, < 5.15.209 | ≥ 6.1.77, < 6.1.175 | ≥ 6.6.16, < 6.6.141 | ≥ 6.7.4, < 6.8 | 6.8
  • linux_kernel≥ 5.15.149, < 5.15.209 | ≥ 6.1.77, < 6.1.175 | ≥ 6.6.16, < 6.6.141 | ≥ 6.7.4, < 6.12.91 | ≥ 6.13, < 6.18.33 | ≥ 6.19, < 7.0.10 | 7.1:rc1
Debian1 product
  • linux< 6.1.176-1 | < 6.12.94-1 | < 7.0.10-1

3 vendors · 157 products

References

49 links
Show all 49 references