io_uring: fix incorrect io_kiocb reference in io_link_skb
In the Linux kernel, the following vulnerability has been resolved: io_uring: fix incorrect io_kiocb reference in io_link_skb In io_link_skb function, there is a bug where prev_notif is incorrectly assigned using 'nd' instead of 'prev_nd'. This causes the context validation check to compare the current notification with itself instead of comparing it with the previous notification. Fix by using the correct prev_nd parameter when obtaining prev_notif.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; 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 help- Published
- Oct 9, 2025
- Updated
- Aug 5, 2026
- EPSS
- 0.2% · 4th percentile
- CWE
- CWE-401
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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%
CNA vs NVD score
- NVD
- 7.8
- CNA · Linux
- 7.8
- agree
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
| 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 kernel6.10 and later · before 6.12.49
- linux linux kernel6.13 and later · before 6.16.9
- linux linux kernel6.17
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
- 6.10affected
- 6fe4220912d19152a26ce19713ab232f4263018d and later · before a89c34babc2e5834aa0905278f26f4dbe4b26b76affected · git
- 6fe4220912d19152a26ce19713ab232f4263018d and later · before 50a98ce1ea694f1ff8e87bc2f8f84096d1736f6aaffected · git
- 6fe4220912d19152a26ce19713ab232f4263018d and later · before 2c139a47eff8de24e3350dadb4c9d5e3426db826affected · git
- before 6.10not affected · semver
- 6.12.49 and later · up to and including 6.12.*not affected · semver
- 6.16.9 and later · up to and including 6.16.*not affected · semver
- 6.17 and laternot affected · original_commit_for_fix
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:13 | linux | before 6.12.57-1 | 6.12.57-1 |
| Debian:14 | linux | before 6.16.9-1 | 6.16.9-1 |
| SUSE:Linux Enterprise Server 16.0 | kernel-livepatch-SLE16_Update_0 | before 5-160000.4.3 | 5-160000.4.3 |
| SUSE:Linux Micro 6.2 | kernel-livepatch-SLE16_Update_1 | before 3-160000.1.1 | 3-160000.1.1 |
| SUSE:Linux Micro 6.2 | kernel-livepatch-SLE16-RT_Update_0 | before 4-160000.3.4 | 4-160000.3.4 |
| SUSE:Linux Micro 6.2 | kernel-livepatch-SLE16-RT_Update_1 | before 3-160000.1.1 | 3-160000.1.1 |
Same product
linux: all recordsOther highest-scoring records for the same primary product.
- 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
- CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV83Now
- CVE-2019-13272In the Linux kernel before 5.1.17, ptrace_link in kernel/ptrace.c mishandles the recording of the credentials of a process that wants to creKEV77This week
- CVE-2013-6282The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the v6k and v7 ARM platforms do not validate certain addKEV77This week
- CVE-2013-2094The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9 uses an incorrect integer data type, which allows loKEV77This week
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 | 2c139a47eff8de24e3350dadb4c9d5e3426db826 | Vendor (CNA) |
| Linux Linux | 50a98ce1ea694f1ff8e87bc2f8f84096d1736f6a | Vendor (CNA) |
| Linux Linux | a89c34babc2e5834aa0905278f26f4dbe4b26b76 | Vendor (CNA) |
| debian:linux | 6.12.57-1 · Debian:13 | Package registry (OSV) |
| suse:kernel-livepatch-SLE16_Update_0 | 5-160000.4.3 · SUSE:Linux Enterprise Server 16.0 | Package registry (OSV) |
| suse:kernel-livepatch-SLE16_Update_1 | 3-160000.1.1 · SUSE:Linux Micro 6.2 | Package registry (OSV) |
| suse:kernel-livepatch-SLE16-RT_Update_0 | 4-160000.3.4 · SUSE:Linux Micro 6.2 | Package registry (OSV) |
| suse:kernel-livepatch-SLE16-RT_Update_1 | 3-160000.1.1 · SUSE:Linux Micro 6.2 | 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)
CWE-401 · Missing Release of Memory after Effective LifetimeCVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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
- git.kernel.org/stable/c/2c139a47eff8de24e3350dadb4c9d5e3426db826
- git.kernel.org/stable/c/50a98ce1ea694f1ff8e87bc2f8f84096d1736f6a
- git.kernel.org/stable/c/a89c34babc2e5834aa0905278f26f4dbe4b26b76
Vendor advisories and official records. Exploit/PoC links are deliberately left out.