sctp: Prevent TOCTOU out-of-bounds write
In the Linux kernel, the following vulnerability has been resolved: sctp: Prevent TOCTOU out-of-bounds write For the following path not holding the sock lock, sctp_diag_dump() -> sctp_for_each_endpoint() -> sctp_ep_dump() make sure not to exceed bounds in case the address list has grown between buffer allocation (time-of-check) and write (time-of-use).
- Published
- Dec 9, 2025
- Updated
- Aug 5, 2026
- EPSS
- 0.2% · 8th percentile
- CWE
- —
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Report tools
Action score
31
Monitor
Low priority for now.
- CVSS
- 31 / 40 · 7.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.2%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- —
- CNA · Linux
- 7.8
- NVD has not scored this yet; the score shown is the CNA’s.
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
—
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
- 4.7affected
- 8f840e47f190cbe61a96945c13e9551048d42cef and later · before b106a68df0650b694b254427cd9250c04500edd3affected · git
- 8f840e47f190cbe61a96945c13e9551048d42cef and later · before 3006959371007fc2eae4a078f823c680fa52de1aaffected · git
- 8f840e47f190cbe61a96945c13e9551048d42cef and later · before 72e3fea68eac8d088e44c3dd954e843478e9240eaffected · git
- 8f840e47f190cbe61a96945c13e9551048d42cef and later · before 584307275b2048991b2e8984962189b6cc0a9b85affected · git
- 8f840e47f190cbe61a96945c13e9551048d42cef and later · before c9119f243d9c0da3c3b5f577a328de3e7ffd1b42affected · git
- 8f840e47f190cbe61a96945c13e9551048d42cef and later · before 2fe08fcaacb7eb019fa9c81db39b2214de216677affected · git
- 8f840e47f190cbe61a96945c13e9551048d42cef and later · before 89eac1e150dbd42963e13d23828cb8c4e0763196affected · git
- 8f840e47f190cbe61a96945c13e9551048d42cef and later · before 95aef86ab231f047bb8085c70666059b58f53c09affected · git
- before 4.7not 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 | before 6.1.159-1 | 6.1.159-1 |
| Debian:13 | linux | before 6.12.63-1 | 6.12.63-1 |
| Debian:14 | linux | before 6.17.8-1 | 6.17.8-1 |
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
- CVE-2026-74309vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler40Plan
- CVE-2026-74280crypto: marvell/octeontx - fix DMA cleanup using wrong loop index40Plan
- CVE-2026-74279crypto: cavium/cpt - fix DMA cleanup using wrong loop index40Plan
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 | 2fe08fcaacb7eb019fa9c81db39b2214de216677 | Vendor (CNA) |
| Linux Linux | 3006959371007fc2eae4a078f823c680fa52de1a | Vendor (CNA) |
| Linux Linux | 584307275b2048991b2e8984962189b6cc0a9b85 | Vendor (CNA) |
| Linux Linux | 72e3fea68eac8d088e44c3dd954e843478e9240e | Vendor (CNA) |
| Linux Linux | 89eac1e150dbd42963e13d23828cb8c4e0763196 | Vendor (CNA) |
| Linux Linux | 95aef86ab231f047bb8085c70666059b58f53c09 | Vendor (CNA) |
| Linux Linux | b106a68df0650b694b254427cd9250c04500edd3 | Vendor (CNA) |
| Linux Linux | c9119f243d9c0da3c3b5f577a328de3e7ffd1b42 | Vendor (CNA) |
| debian:linux | 6.1.159-1 · Debian:12 | 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.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
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
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
—
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvd-secondary
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.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- git.kernel.org/stable/c/2fe08fcaacb7eb019fa9c81db39b2214de216677
- git.kernel.org/stable/c/3006959371007fc2eae4a078f823c680fa52de1a
- git.kernel.org/stable/c/584307275b2048991b2e8984962189b6cc0a9b85
- git.kernel.org/stable/c/72e3fea68eac8d088e44c3dd954e843478e9240e
- git.kernel.org/stable/c/89eac1e150dbd42963e13d23828cb8c4e0763196
- git.kernel.org/stable/c/95aef86ab231f047bb8085c70666059b58f53c09
- git.kernel.org/stable/c/b106a68df0650b694b254427cd9250c04500edd3
- git.kernel.org/stable/c/c9119f243d9c0da3c3b5f577a328de3e7ffd1b42
Vendor advisories and official records. Exploit/PoC links are deliberately left out.