CVE-2026-98058
CVE-2026-98058
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.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| linux_kernel linux |
≥ 5.14; < 6.6.160 (affected, custom) | NVD |
| linux_kernel linux |
≥ 6.7; < 6.12.114 (affected, custom) | NVD |
| linux_kernel linux |
≥ 6.13; < 6.18.57 (affected, custom) | NVD |
| linux_kernel linux |
≥ 6.19; < 7.2.7 (affected, custom) | NVD |
| linux_kernel linux |
7.3 (affected, custom) | NVD |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
NVD applicability configurations (1)
These expressions retain AND/OR operators, negation, and required environmental products. A listed product is not sufficient to establish exposure when additional conditions apply.
[
{
"negate": false,
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.160",
"versionStartIncluding": "5.14",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.114",
"versionStartIncluding": "6.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.57",
"versionStartIncluding": "6.13",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.2.7",
"versionStartIncluding": "6.19",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:7.3:rc1:*:*:*:*:*:*",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "OR"
}
]CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 5.5 medium |
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | NVD: [email protected] |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://git.kernel.org/stable/c/3408e98f06ce06ea6a58ca6c39da9c23f0029c06416baaa9-dc9f-4396-8d5f-8c081fb06d67 · Patch
- https://git.kernel.org/stable/c/65f636322ac402add6046c68e9ece77b9ffd71c9416baaa9-dc9f-4396-8d5f-8c081fb06d67 · Patch
- https://git.kernel.org/stable/c/9496d857205e60241034b798d7745ff8830ba599416baaa9-dc9f-4396-8d5f-8c081fb06d67 · Patch
- https://git.kernel.org/stable/c/d05524794240b52fdc3b6c1220dd05505715824d416baaa9-dc9f-4396-8d5f-8c081fb06d67 · Patch
- https://git.kernel.org/stable/c/d8cfe9f71d302970ae393616960f2b3021d2b3b0416baaa9-dc9f-4396-8d5f-8c081fb06d67 · Patch
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