mptcp: fix race in mptcp_pm_nl_flush_addrs_doit()
In the Linux kernel, the following vulnerability has been resolved: mptcp: fix race in mptcp_pm_nl_flush_addrs_doit() syzbot and Eulgyu Kim reported crashes in mptcp_pm_nl_get_local_id() and/or mptcp_pm_nl_is_backup() Root cause is list_splice_init() in mptcp_pm_nl_flush_addrs_doit() which is not RCU ready. list_splice_init_rcu() can not be called here while holding pernet->lock spinlock. Many thanks to Eulgyu Kim for providing a repro and testing our patches.
- Published
- Feb 14, 2026
- Updated
- Aug 5, 2026
- EPSS
- 0.1% · 2th percentile
- CWE
- CWE-362
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Report tools
Action score
18
Monitor
Low priority for now.
- CVSS
- 18 / 40 · 4.7 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.1%
CNA vs NVD score
- NVD
- 4.7
- CNA · Linux
- 7.8
- 3.1 point gap
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
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 helpAffected 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 kernel5.11 and later · before 5.15.201
- linux linux kernel5.16 and later · before 6.1.164
- linux linux kernel6.2 and later · before 6.6.125
- linux linux kernel6.7 and later · before 6.12.72
- linux linux kernel6.13 and later · before 6.18.9
- linux linux kernel6.19
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
- 5.11affected
- 141694df6573b49aa4143c92556544b4b0bbda72 and later · before 338d40bab283da2639780ee3e458fb61f1567d8caffected · git
- 141694df6573b49aa4143c92556544b4b0bbda72 and later · before 7896dbe990d56d5bb8097863b2645355633665ebaffected · git
- 141694df6573b49aa4143c92556544b4b0bbda72 and later · before 455e882192c9833f176f3fbbbb2f036b6c5bf555affected · git
- 141694df6573b49aa4143c92556544b4b0bbda72 and later · before 51223bdd0f60b06cfc7f25885c4d4be917adba94affected · git
- 141694df6573b49aa4143c92556544b4b0bbda72 and later · before 1f1b9523527df02685dde603f20ff6e603d8e4a1affected · git
- 141694df6573b49aa4143c92556544b4b0bbda72 and later · before e2a9eeb69f7d4ca4cf4c70463af77664fdb6ab1daffected · git
- before 5.11not affected · semver
- 5.15.201 and later · up to and including 5.15.*not affected · semver
- 6.1.164 and later · up to and including 6.1.*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 | before 6.1.164-1 | 6.1.164-1 |
| Debian:13 | linux | before 6.12.73-1 | 6.12.73-1 |
| Debian:14 | linux | before 6.18.9-1 | 6.18.9-1 |
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 | 1f1b9523527df02685dde603f20ff6e603d8e4a1 | Vendor (CNA) |
| Linux Linux | 338d40bab283da2639780ee3e458fb61f1567d8c | Vendor (CNA) |
| Linux Linux | 455e882192c9833f176f3fbbbb2f036b6c5bf555 | Vendor (CNA) |
| Linux Linux | 51223bdd0f60b06cfc7f25885c4d4be917adba94 | Vendor (CNA) |
| Linux Linux | 7896dbe990d56d5bb8097863b2645355633665eb | Vendor (CNA) |
| Linux Linux | e2a9eeb69f7d4ca4cf4c70463af77664fdb6ab1d | Vendor (CNA) |
| debian:linux | 6.1.164-1 · 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.
- Special conditions such as timing or configuration are required.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- High
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-362 · Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')CVSS vector
CVSS:3.1/AV:L/AC:H/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.
Attack patterns (CAPEC)
ATT&CK techniques
—
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- git.kernel.org/stable/c/1f1b9523527df02685dde603f20ff6e603d8e4a1
- git.kernel.org/stable/c/338d40bab283da2639780ee3e458fb61f1567d8c
- git.kernel.org/stable/c/455e882192c9833f176f3fbbbb2f036b6c5bf555
- git.kernel.org/stable/c/51223bdd0f60b06cfc7f25885c4d4be917adba94
- git.kernel.org/stable/c/7896dbe990d56d5bb8097863b2645355633665eb
- git.kernel.org/stable/c/e2a9eeb69f7d4ca4cf4c70463af77664fdb6ab1d
Vendor advisories and official records. Exploit/PoC links are deliberately left out.