CVE-2026-43010: bpf: Reject sleepable kprobe_multi programs at attach time
Noroxi assessment
Priority: Monitor (action score 22/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 0.12% (FIRST EPSS).
- Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
- Fixed version: Linux Linux 89327ed787746a7aa4db3c97f91d2e294228932b, c2b5e13dee9cc83e664daf4c13077dcc618a44e9, d97b19fe5265f7901b2c862f88a4eb1b129a0b61.
- Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).
Low priority for now. Upgrade to Linux Linux 89327ed787746a7aa4db3c97f91d2e294228932b, c2b5e13dee9cc83e664daf4c13077dcc618a44e9, d97b19fe5265f7901b2c862f88a4eb1b129a0b61 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
In the Linux kernel, the following vulnerability has been resolved: bpf: Reject sleepable kprobe_multi programs at attach time kprobe.multi programs run in atomic/RCU context and cannot sleep. However, bpf_kprobe_multi_link_attach() did not validate whether the program being attached had the sleepable flag set, allowing sleepable helpers such as bpf_copy_from_user() to be invoked from a non-sleepable context. This causes a "sleeping function called from invalid context" splat: BUG: sleeping function called from invalid context at ./include/linux/uaccess.h:169 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 1787, name: sudo preempt_count: 1, expected: 0 RCU nest depth: 2, expected: 0 Fix this by rejecting sleepable programs early in bpf_kprobe_multi_link_attach(), before any further processing.
- Published
- May 1, 2026
- Updated
- Oct 30, 2026
- EPSS
- 0.1% · 1th percentile
- CWE
- —
Report tools
Action score
22
Monitor
Low priority for now.
- CVSS
- 22 / 40 · 5.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.1%
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| linux | linux kernel | cpe:2.3:o:linux:linux_kernel |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- linux linux kernel5.18 and later · before 6.18.22
- linux linux kernel6.19 and later · before 6.19.12
- linux linux kernel7.0
Versions reported by the vendor
Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.
Linux Linux
- 5.18affected
- 0dcac272540613d41c05e89679e4ddb978b612f1 and later · before c2b5e13dee9cc83e664daf4c13077dcc618a44e9affected · git
- 0dcac272540613d41c05e89679e4ddb978b612f1 and later · before 89327ed787746a7aa4db3c97f91d2e294228932baffected · git
- 0dcac272540613d41c05e89679e4ddb978b612f1 and later · before d97b19fe5265f7901b2c862f88a4eb1b129a0b61affected · git
- 0dcac272540613d41c05e89679e4ddb978b612f1 and later · before dc9a060d76c12b23c5f378ee115d5e5d03d8bbf3affected · git
- 0dcac272540613d41c05e89679e4ddb978b612f1 and later · before f952157e695fd434bdc05af63a703bb082a78717affected · git
- 0dcac272540613d41c05e89679e4ddb978b612f1 and later · before eb7024bfcc5f68ed11ed9dd4891a3073c15f04a8affected · git
- before 5.18not affected · semver
- 6.1.191 and later · up to and including 6.1.*not affected · semver
- 6.6.144 and later · up to and including 6.6.*not affected · semver
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | linux | from 0 | — |
| Debian:13 | linux | before 6.12.95-1 | 6.12.95-1 |
| Debian:14 | linux | before 6.19.12-1 | 6.19.12-1 |
| SUSE:Linux Enterprise Live Patching 15 SP7 | kernel-livepatch-SLE15-SP7_Update_18 | before 1-150700.15.3.1 | 1-150700.15.3.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP7 | kernel-64kb | before 6.4.0-150700.53.66.1 | 6.4.0-150700.53.66.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP7 | kernel-default | before 6.4.0-150700.53.66.1 | 6.4.0-150700.53.66.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP7 | kernel-default-base | before 6.4.0-150700.53.66.1.150700.17.39.1 | 6.4.0-150700.53.66.1.150700.17.39.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP7 | kernel-source | before 6.4.0-150700.53.66.1 | 6.4.0-150700.53.66.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP7 | kernel-zfcpdump | before 6.4.0-150700.53.66.1 | 6.4.0-150700.53.66.1 |
| SUSE:Linux Enterprise Module for Development Tools 15 SP7 | kernel-docs | before 6.4.0-150700.53.66.2 | 6.4.0-150700.53.66.2 |
| SUSE:Linux Enterprise Module for Development Tools 15 SP7 | kernel-obs-build | before 6.4.0-150700.53.66.1 | 6.4.0-150700.53.66.1 |
| SUSE:Linux Enterprise Module for Development Tools 15 SP7 | kernel-syms | before 6.4.0-150700.53.66.1 | 6.4.0-150700.53.66.1 |
| SUSE:Linux Enterprise Module for Public Cloud 15 SP7 | kernel-azure | before 6.4.0-150700.53.66.1 | 6.4.0-150700.53.66.1 |
| SUSE:Linux Micro 6.0 | kernel-default | before 6.4.0-49.1 | 6.4.0-49.1 |
| SUSE:Linux Micro 6.0 | kernel-kvmsmall | before 6.4.0-49.1 | 6.4.0-49.1 |
| SUSE:Linux Micro 6.0 | kernel-rt | before 6.4.0-49.1 | 6.4.0-49.1 |
| SUSE:Linux Micro 6.0 | kernel-source | before 6.4.0-49.1 | 6.4.0-49.1 |
| SUSE:Linux Micro 6.0 | kernel-source-rt | before 6.4.0-49.1 | 6.4.0-49.1 |
Same product
linux: all recordsOther highest-scoring records for the same primary product.
- CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV90Now
- CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV89Now
- CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV85Now
Published before and after this one in the same product
- ← EarlierCVE-2026-31779May 1, 2026 · wifi: iwlwifi: mvm: fix potential out-of-bounds read in iwl_mvm_nd_match_info_handler()32Monitor
- ← EarlierCVE-2026-43009May 1, 2026 · bpf: Fix incorrect pruning due to atomic fetch precision tracking31Monitor
- Later →CVE-2026-43011May 1, 2026 · net/x25: Fix potential double free of skb39Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Linux Linux | 89327ed787746a7aa4db3c97f91d2e294228932b | Vendor (CNA) |
| Linux Linux | c2b5e13dee9cc83e664daf4c13077dcc618a44e9 | Vendor (CNA) |
| Linux Linux | d97b19fe5265f7901b2c862f88a4eb1b129a0b61 | Vendor (CNA) |
| Linux Linux | dc9a060d76c12b23c5f378ee115d5e5d03d8bbf3 | Vendor (CNA) |
| Linux Linux | eb7024bfcc5f68ed11ed9dd4891a3073c15f04a8 | Vendor (CNA) |
| Linux Linux | f952157e695fd434bdc05af63a703bb082a78717 | Vendor (CNA) |
| debian:linux | 6.12.95-1 · Debian:13 | Package registry (OSV) |
| suse:kernel-64kb | 6.4.0-150700.53.66.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP7 | Package registry (OSV) |
| suse:kernel-default | 6.4.0-49.1 · SUSE:Linux Micro 6.0 | Package registry (OSV) |
| suse:kernel-default-base | 6.4.0-150700.53.66.1.150700.17.39.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP7 | Package registry (OSV) |
| suse:kernel-docs | 6.4.0-150700.53.66.2 · SUSE:Linux Enterprise Module for Development Tools 15 SP7 | Package registry (OSV) |
| suse:kernel-kvmsmall | 6.4.0-49.1 · SUSE:Linux Micro 6.0 | Package registry (OSV) |
| suse:kernel-livepatch-SLE15-SP7_Update_18 | 1-150700.15.3.1 · SUSE:Linux Enterprise Live Patching 15 SP7 | Package registry (OSV) |
| suse:kernel-obs-build | 6.4.0-150700.53.66.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP7 | Package registry (OSV) |
| suse:kernel-rt | 6.4.0-49.1 · SUSE:Linux Micro 6.0 | Package registry (OSV) |
| suse:kernel-source | 6.4.0-49.1 · SUSE:Linux Micro 6.0 | Package registry (OSV) |
| suse:kernel-source-rt | 6.4.0-49.1 · SUSE:Linux Micro 6.0 | Package registry (OSV) |
| suse:kernel-syms | 6.4.0-150700.53.66.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP7 | Package registry (OSV) |
| suse:kernel-zfcpdump | 6.4.0-150700.53.66.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP7 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
No history yet (it accumulates with the daily EPSS job).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-26-0143 · May 4, 2026(Linux Kernel Güvenlik Bildirimi)
Technical details
Attack conditions
- Someone with local access to the system can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
—
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (5 more)Show less
- git.kernel.org/stable/c/c2b5e13dee9cc83e664daf4c13077dcc618a44e9
- git.kernel.org/stable/c/d97b19fe5265f7901b2c862f88a4eb1b129a0b61
- git.kernel.org/stable/c/dc9a060d76c12b23c5f378ee115d5e5d03d8bbf3
- git.kernel.org/stable/c/eb7024bfcc5f68ed11ed9dd4891a3073c15f04a8
- git.kernel.org/stable/c/f952157e695fd434bdc05af63a703bb082a78717
Vendor advisories and official records. Exploit/PoC links are deliberately left out.