drm/amd/display: Avoid NULL dereference in dc_dmub_srv error paths
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Avoid NULL dereference in dc_dmub_srv error paths In dc_dmub_srv_log_diagnostic_data() and dc_dmub_srv_enable_dpia_trace(). Both functions check: if (!dc_dmub_srv || !dc_dmub_srv->dmub) and then call DC_LOG_ERROR() inside that block. DC_LOG_ERROR() uses dc_dmub_srv->ctx internally. So if dc_dmub_srv is NULL, the logging itself can dereference a NULL pointer and cause a crash. Fix this by splitting the checks. First check if dc_dmub_srv is NULL and return immediately. Then check dc_dmub_srv->dmub and log the error only when dc_dmub_srv is valid. Fixes the below: ../display/dc/dc_dmub_srv.c:962 dc_dmub_srv_log_diagnostic_data() error: we previously assumed 'dc_dmub_srv' could be null (see line 961) ../display/dc/dc_dmub_srv.c:1167 dc_dmub_srv_enable_dpia_trace() error: we previously assumed 'dc_dmub_srv' could be null (see line 1166)
CVE-2026-53313
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-53313
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2631ac1ac328189031d1aefbbd4929050f72fb23",
"lessThan": "1cad9afbb2d559b738b83c498f9c1abdfd327e7f",
"versionType": "git"
},
{
"status": "affected",
"version": "2631ac1ac328189031d1aefbbd4929050f72fb23",
"lessThan": "a71fdbd6e8289e2725d33a9873833459f3b1824f",
"versionType": "git"
},
{
"status": "affected",
"version": "2631ac1ac328189031d1aefbbd4929050f72fb23",
"lessThan": "2ab18de5ebb11c76bfc8087c5a09fbcccd0dea8a",
"versionType": "git"
},
{
"status": "affected",
"version": "2631ac1ac328189031d1aefbbd4929050f72fb23",
"lessThan": "b37a978e6d8c33fbfa4abc5dcca4c7cfc6d01f22",
"versionType": "git"
},
{
"status": "affected",
"version": "2631ac1ac328189031d1aefbbd4929050f72fb23",
"lessThan": "4ae3e16f4b3bf64140f773629b765d605ee079a9",
"versionType": "git"
}
],
"programFiles": [
"drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.14"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.14",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.109",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.50",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.10",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-53313
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #46389 · Revision 1
- Added to Heist Feed
- Publisher date