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)
References
Configurations
Configuration 1 (hide)
|
History
07 Jul 2026, 16:51
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.1 |
| References | () https://git.kernel.org/stable/c/04e271a952b8863bbafc99bd51aca4c32bff0e0d - Patch | |
| References | () https://git.kernel.org/stable/c/0e56f460bddb397fa9a8e6faf7ae7eaa86953eb1 - Patch | |
| References | () https://git.kernel.org/stable/c/2645e3caf7e013189da9c6ff621d006cca5a538b - Patch | |
| References | () https://git.kernel.org/stable/c/499c6b43a79dd684bddbd18fe8b2235aa2764db4 - Patch | |
| References | () https://git.kernel.org/stable/c/6173cfea2f916e01c4f98e29cd654384a05e32a3 - Patch | |
| References | () https://git.kernel.org/stable/c/6723188c42ca3b34a9fce634d7a0ecc9ccd5cd56 - Patch | |
| References | () https://git.kernel.org/stable/c/e94f5323c41f32a74160378c3b19850d1f203ad5 - Patch | |
| References | () https://git.kernel.org/stable/c/ff287df16a1a58aca78b08d1f3ee09fc44da0351 - Patch | |
| CWE | CWE-125 | |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:* |
|
| First Time |
Linux linux Kernel
Linux |
04 Jul 2026, 12:16
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
25 Jun 2026, 09:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-06-25 09:16
Updated : 2026-07-07 16:51
NVD link : CVE-2026-53138
Mitre link : CVE-2026-53138
CVE.ORG link : CVE-2026-53138
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-125
Out-of-bounds Read