CVE-2026-98046: Linux kernel · bpf: Mark bpf_btf_find_by_name_kind() as sleepable
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in b843ab43ac9d2fa1ddd0dab8d0dcc19dbf764e2f : patch Linux kernel soon.
Data as of 26 Oct 2026, 14:05 UTC
Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in b843ab43ac9d2fa1ddd0dab8d0dcc19dbf764e2f, 620614bf7672130c43b3cff375525a2202f61979, 29e40175617216fbd4544529f6bfb51d1ab95ba1 +3
Exploitation evidence
Disclosed: evidence found.
CVE published 25 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
AI-suggested
A fix is available and has been applied in the Linux kernel. The bpf_btf_find_by_name_kind() helper is now marked as sleepable, preventing its use in non-sleepable contexts such as BPF timer callbacks. Users should update to the fixed kernel versions containing the listed commits to remediate this issue.
Description
A vulnerability in the Linux kernel's BPF subsystem involves the helper function bpf_btf_find_by_name_kind() not being marked as sleepable. This function can sleep while allocating file descriptors, but the verifier incorrectly allows its use in non-sleepable contexts such as BPF timer callbacks. This mismatch can cause sleeping in softirq context, which is unsafe. The issue has been fixed by marking the helper as sleepable, preventing its use in non-sleepable contexts.
References
- git.kernel.org/stable/c/7bf23cf7c9c0e0b5e638e497cdc0ec3f223742cc (opens in a new tab)
- git.kernel.org/stable/c/b843ab43ac9d2fa1ddd0dab8d0dcc19dbf764e2f (opens in a new tab)
- git.kernel.org/stable/c/29e40175617216fbd4544529f6bfb51d1ab95ba1 (opens in a new tab)
- git.kernel.org/stable/c/4d8784226bd3c6a707975081f986078f40456cec (opens in a new tab)
- git.kernel.org/stable/c/17f54a8f2b9714529d56edbbe12d448ccdbbf469 (opens in a new tab)
- git.kernel.org/stable/c/620614bf7672130c43b3cff375525a2202f61979 (opens in a new tab)