Answer in brief
CVE-2026-53138 records a High severity (CVSS 7.1) vulnerability in drm/amd/display: Bound VBIOS record-chain walk loops. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <e94f5323c41f32a74160378c3b19850d1f203ad5 || >=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <04e271a952b8863bbafc99bd51aca4c32bff0e0d || >=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <6723188c42ca3b34a9fce634d7a0ecc9ccd5cd56 || >=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <499c6b43a79dd684bddbd18fe8b2235aa2764db4 || >=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <6173cfea2f916e01c4f98e29cd654384a05e32a3 || >=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <0e56f460bddb397fa9a8e6faf7ae7eaa86953eb1 || >=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <2645e3caf7e013189da9c6ff621d006cca5a538b || >=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <ff287df16a1a58aca78b08d1f3ee09fc44da0351 | e94f5323c41f32a74160378c3b19850d1f203ad5, 04e271a952b8863bbafc99bd51aca4c32bff0e0d, 6723188c42ca3b34a9fce634d7a0ecc9ccd5cd56, 499c6b43a79dd684bddbd18fe8b2235aa2764db4, 6173cfea2f916e01c4f98e29cd654384a05e32a3, 0e56f460bddb397fa9a8e6faf7ae7eaa86953eb1, 2645e3caf7e013189da9c6ff621d006cca5a538b, ff287df16a1a58aca78b08d1f3ee09fc44da0351 |
| Linux/Linuxgeneric | 4.15 | Not reported |
Published upstream
Jun 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 25, 2026
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)
Quoted source text, attributed separately from HOL analysis.