CVE-2026-90300: bpf: Clear buf on error in __bpf_get_task_stack
Noroxi assessment
Priority: Monitor (action score 0/100)
- 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: 0.21% (FIRST EPSS).
- Fixed version: Linux Linux 1f0f61573ba4cb899105b5cef65be3ca02205f93, 4acc761b4e3feca1eb648d21fc4d665b23c5372d, 5.11; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 Release Notes; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes.
Low priority for now. Upgrade to Linux Linux 1f0f61573ba4cb899105b5cef65be3ca02205f93, 4acc761b4e3feca1eb648d21fc4d665b23c5372d, 5.11; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 Release Notes; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes 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: Clear buf on error in __bpf_get_task_stack Both bpf_get_task_stack and bpf_get_task_stack_sleepable helpers that use __bpf_get_task_stack have buf defined as ARG_PTR_TO_UNINIT_MEM argument and we should initialize the buf on every return path. Adding missing buf memset for __bpf_get_task_stack fail paths. This provides deterministic buffer contents, which is useful when the buffer is used directly as a map key.
- Published
- Sep 17, 2026
- Updated
- Oct 30, 2026
- EPSS
- 0.2% · 11th percentile
- CWE
- —
Report tools
Action score
0
Monitor
Low priority for now.
- CVSS
- 0 / 40 · —
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.2%
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.
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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
- d921baabd96445ef9c9c9410ca06164359c8a1a5, 9c020a533eaae1c2d41a7e3835c4c818a9b4b656, ff6bdc205fd0a83bd365405d4e31fb5905826996, 5.12affected
- 06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df and later · before 5c4c57a277a87ed235183d03b671d346f5101f62affected · git
- 06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df and later · before 4acc761b4e3feca1eb648d21fc4d665b23c5372daffected · git
- 06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df and later · before 6f5a7bcc049709af12e403111d5e73e80910dafcaffected · git
- 06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df and later · before 1f0f61573ba4cb899105b5cef65be3ca02205f93affected · git
- 06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df and later · before f523359c4789bb0396d2d642464a6e2fd4f2299daffected · git
- 06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df and later · before f5d242825ca417bb6afe35fde6e8880f97ca43fbaffected · git
- 5.10.30 and later · before 5.11affected · semver
- 5.11.14 and later · before 5.12affected · semver
- 5.10.96 and later · before 5.11affected · 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 6.12.115-2 | 6.12.115-2 |
| Debian:14 | linux | before 7.2.6-1 | 7.2.6-1 |
Same product
linux: all recordsOther highest-scoring records for the same primary product.
- CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation40Plan
- CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment40Plan
- CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()40Plan
Published before and after this one in the same product
- ← EarlierCVE-2026-90298Sep 17, 2026 · drm/sun4i: tcon: Drop TCON TOP device reference0Monitor
- ← EarlierCVE-2026-90299Sep 17, 2026 · bpf: Fix sleepable check for tracing/lsm prog0Monitor
- Later →CVE-2026-90301Sep 17, 2026 · ocfs2: o2hb: quiesce negotiate handlers and timeout work32Monitor
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 | 1f0f61573ba4cb899105b5cef65be3ca02205f93 | Vendor (CNA) |
| Linux Linux | 4acc761b4e3feca1eb648d21fc4d665b23c5372d | Vendor (CNA) |
| Linux Linux | 5.11 | Vendor (CNA) |
| Linux Linux | 5.12 | Vendor (CNA) |
| Linux Linux | 5c4c57a277a87ed235183d03b671d346f5101f62 | Vendor (CNA) |
| Linux Linux | 6f5a7bcc049709af12e403111d5e73e80910dafc | Vendor (CNA) |
| Linux Linux | f523359c4789bb0396d2d642464a6e2fd4f2299d | Vendor (CNA) |
| Linux Linux | f5d242825ca417bb6afe35fde6e8880f97ca43fb | Vendor (CNA) |
| azl3 kernel 6.6.150.1-1 on Azure Linux 3.0 | — | Microsoft (MSRC) |
| azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 | Release Notes | Microsoft (MSRC) |
| azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 | Release Notes | Microsoft (MSRC) |
| azl3 kernel 6.6.159.1-1 on Azure Linux 3.0 | Release Notes | Microsoft (MSRC) |
| debian:linux | 6.12.115-2 · Debian:13 | Package registry (OSV) |
| debian:linux | 7.2.6-1 · Debian:14 | 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.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
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.
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Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
No CVSS vector for this record, so attack conditions can't be derived.
Weakness class (CWE)
—
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/4acc761b4e3feca1eb648d21fc4d665b23c5372d
- git.kernel.org/stable/c/5c4c57a277a87ed235183d03b671d346f5101f62
- git.kernel.org/stable/c/6f5a7bcc049709af12e403111d5e73e80910dafc
- git.kernel.org/stable/c/f523359c4789bb0396d2d642464a6e2fd4f2299d
- git.kernel.org/stable/c/f5d242825ca417bb6afe35fde6e8880f97ca43fb
Vendor advisories and official records. Exploit/PoC links are deliberately left out.