bpf: Clear buf on error in __bpf_get_task_stack
In the Linux kernel, the following vulnerability has been resolved: bpf: Clear buf on error in __bpf_get_task_stack Both bpf_get_task_stack and bpf_get_task_stack_sleepable helpers that use __bpf_get_task_stack have buf defined as ARG_PTR_TO_UNINIT_MEM argument and we should initialize the buf on every return path. Adding missing buf memset for __bpf_get_task_stack fail paths. This provides deterministic buffer contents, which is useful when the buffer is used directly as a map key.
CVE-2026-90300
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-2026-90300
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": "06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df",
"lessThan": "4acc761b4e3feca1eb648d21fc4d665b23c5372d",
"versionType": "git"
},
{
"status": "affected",
"version": "06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df",
"lessThan": "6f5a7bcc049709af12e403111d5e73e80910dafc",
"versionType": "git"
},
{
"status": "affected",
"version": "06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df",
"lessThan": "1f0f61573ba4cb899105b5cef65be3ca02205f93",
"versionType": "git"
},
{
"status": "affected",
"version": "06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df",
"lessThan": "f523359c4789bb0396d2d642464a6e2fd4f2299d",
"versionType": "git"
},
{
"status": "affected",
"version": "06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df",
"lessThan": "f5d242825ca417bb6afe35fde6e8880f97ca43fb",
"versionType": "git"
},
{
"status": "affected",
"version": "d921baabd96445ef9c9c9410ca06164359c8a1a5",
"versionType": "git"
},
{
"status": "affected",
"version": "9c020a533eaae1c2d41a7e3835c4c818a9b4b656",
"versionType": "git"
},
{
"status": "affected",
"version": "ff6bdc205fd0a83bd365405d4e31fb5905826996",
"versionType": "git"
},
{
"status": "affected",
"version": "5.10.30",
"lessThan": "5.11",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.11.14",
"lessThan": "5.12",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.10.96",
"lessThan": "5.11",
"versionType": "semver"
}
],
"programFiles": [
"kernel/bpf/stackmap.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.12"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.12",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.57",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"kernel/bpf/stackmap.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-90300
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48653 · Revision 1
- Added to Heist Feed
- Publisher date