bpf: Mark faultable stack helpers as sleepable
In the Linux kernel, the following vulnerability has been resolved: bpf: Mark faultable stack helpers as sleepable The faultable variants of bpf_get_stack() and bpf_get_task_stack() pass may_fault=true into the common stack collection code. Resolving user-space build IDs may then call build_id_parse_file() and block on filesystem reads. Neither helper prototype sets might_sleep. Since prototype selection uses the sleepability of the whole program, the verifier can still allow these helpers from a non-sleepable region within that program, such as an explicit RCU or preemption-disabled region. The task-stack helper can also be called from a non-sleepable timer callback of a sleepable program. Mark both faultable prototypes as sleepable. The existing helper context check then rejects these calls while continuing to allow them in genuinely sleepable contexts.
CVE-2026-98045
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-2026-98045
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": "d4dd9775ec242425576af93daadb80a34083a53c",
"lessThan": "44b8d370f2725bad215da3e67668e98ba96671bd",
"versionType": "git"
},
{
"status": "affected",
"version": "d4dd9775ec242425576af93daadb80a34083a53c",
"lessThan": "3014e8a8bdad55075d89836ad9c10710a9a69837",
"versionType": "git"
},
{
"status": "affected",
"version": "d4dd9775ec242425576af93daadb80a34083a53c",
"lessThan": "19e8d5a98afd071d8c1c5adeccf92b3c42eddc70",
"versionType": "git"
},
{
"status": "affected",
"version": "d4dd9775ec242425576af93daadb80a34083a53c",
"lessThan": "9d02927fdf4e930893c92e35fed01a2704496900",
"versionType": "git"
}
],
"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": "6.12"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.12",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.111",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.53",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.7",
"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-2026-98045
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38165 · Revision 1
- Added to Heist Feed
- Publisher date