7.1

CVE-2026-53138: linux Out-of-bounds Read

CVSS: 7.1v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-53138DEBIAN-CVE-2026-53138CGA-3qxg-2hxp-q4fm
Published 25-06-2026Last modified 04-07-2026
Open JSON

Vulnerability summary

CVE-2026-53138 is a high (CVSS 7.1) Out-of-bounds Read vulnerability in linux. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2% of scored vulnerabilities.

Overall risk
28/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.1/10
010
High · 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 37 · Related 37
MGASA-2026-0312OPENSUSE-SU-2026:21555-1SUSE-SU-2026:22521-1SUSE-SU-2026:22522-1SUSE-SU-2026:22665-1SUSE-SU-2026:22666-1

Timeline

  1. 25-06-2026
    PublishedVulnerability first disclosed.
  2. 04-07-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Bound VBIOS record-chain walk loops [Why & How] All record-chain walk loops in bios_parser.c and bios_parser2.c use for(;;) and only terminate on a 0xFF record_type sentinel or zero record_size. A malformed VBIOS image missing the terminator record causes unbounded iteration at probe time, potentially hundreds of thousands of iterations with record_size=1. In the final iterations near the BIOS image boundary, struct casts beyond the 2-byte header validated by GET_IMAGE can also read out of bounds. Cap all 14 record-chain walk loops to BIOS_MAX_NUM_RECORD (256) iterations. The atombios.h defines up to 22 distinct record types and atomfirmware.h has 13. Assuming an average of less than 10 records per type (which is reasonable since most are connector- based) 256 is a generous upper bound. (cherry picked from commit 95700a3d660287ed657d6892f7be9ffc0e294a93)

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 0.13% 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

Affected systems

Ubuntu167 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)
Chainguard7 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≥ 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c, < e94f5323c41f32a74160378c3b19850d1f203ad5 | ≥ 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c, < 04e271a952b8863bbafc99bd51aca4c32bff0e0d | ≥ 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c, < 6723188c42ca3b34a9fce634d7a0ecc9ccd5cd56 | ≥ 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c, < 499c6b43a79dd684bddbd18fe8b2235aa2764db4 | ≥ 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c, < 6173cfea2f916e01c4f98e29cd654384a05e32a3 | ≥ 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c, < 0e56f460bddb397fa9a8e6faf7ae7eaa86953eb1 | ≥ 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c, < 2645e3caf7e013189da9c6ff621d006cca5a538b | ≥ 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c, < ff287df16a1a58aca78b08d1f3ee09fc44da0351 | 4.15
  • linux_kernel≥ 4.15, < 5.10.260 | ≥ 5.11, < 5.15.211 | ≥ 5.16, < 6.1.177 | ≥ 6.2, < 6.6.144 | ≥ 6.7, < 6.12.94 | ≥ 6.13, < 6.18.36 | ≥ 6.19, < 7.0.13 | 7.1:rc1 | 7.1:rc2 | 7.1:rc3 | 7.1:rc4 | 7.1:rc5 | 7.1:rc6
Debian1 product
  • linux< 6.1.177-1 | < 6.12.94-1 | < 7.0.13-1

4 vendors · 177 products

References

37 links
Show all 37 references