bpf: Mark syscall helpers as sleepable
In the Linux kernel, the following vulnerability has been resolved: bpf: Mark syscall helpers as sleepable bpf_sys_bpf() executes the bpf(2) syscall body, which can take mutexes, allocate with GFP_KERNEL, and wait for an RCU grace period. bpf_sys_close() reaches close_fd() and filp_close(), which can sleep as well. Both helpers are limited to BPF_PROG_TYPE_SYSCALL, whose main program is sleepable. That does not make every callback sleepable: a syscall program can register a bpf_timer callback, and the verifier checks that callback in a non-sleepable context while retaining the syscall helper set. Without .might_sleep on the prototypes, such a callback can invoke bpf_sys_bpf() from hrtimer softirq context and trigger a scheduling-while-atomic failure. bpf_sys_close() is exposed through the same missing context check. Set .might_sleep on both prototypes so the existing helper-context check rejects them from timer callbacks and other atomic regions. Calls from the sleepable main body remain valid.
CVE-2026-98058
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-2026-98058
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": "79a7f8bdb159d9914b58740f3d31d602a6e4aca8",
"lessThan": "9496d857205e60241034b798d7745ff8830ba599",
"versionType": "git"
},
{
"status": "affected",
"version": "79a7f8bdb159d9914b58740f3d31d602a6e4aca8",
"lessThan": "d8cfe9f71d302970ae393616960f2b3021d2b3b0",
"versionType": "git"
},
{
"status": "affected",
"version": "79a7f8bdb159d9914b58740f3d31d602a6e4aca8",
"lessThan": "65f636322ac402add6046c68e9ece77b9ffd71c9",
"versionType": "git"
},
{
"status": "affected",
"version": "79a7f8bdb159d9914b58740f3d31d602a6e4aca8",
"lessThan": "3408e98f06ce06ea6a58ca6c39da9c23f0029c06",
"versionType": "git"
},
{
"status": "affected",
"version": "79a7f8bdb159d9914b58740f3d31d602a6e4aca8",
"lessThan": "d05524794240b52fdc3b6c1220dd05505715824d",
"versionType": "git"
}
],
"programFiles": [
"kernel/bpf/syscall.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": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.57",
"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/syscall.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98058
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48841 · Revision 1
- Added to Heist Feed
- Publisher date