tipc: fix integer overflow in tipc_recvmsg() and tipc_recvstream()
In the Linux kernel, the following vulnerability has been resolved: tipc: fix integer overflow in tipc_recvmsg() and tipc_recvstream() In tipc_recvmsg(), the copy length is computed as: copy = min_t(int, dlen - offset, buflen); buflen is size_t but min_t(int, ...) casts it to int. When buflen exceeds INT_MAX (e.g. 0xFFFFFFFF via io_uring provided buffers), it wraps negative, wins the comparison, and the negative copy length propagates to simple_copy_to_iter() where int-to-size_t promotion makes it SIZE_MAX, triggering a WARN_ON. tipc_recvstream() has the same pattern. Kernel panic - not syncing: kernel: panic_on_warn set ... RIP: 0010:simple_copy_to_iter+0x9e/0xd0 (net/core/datagram.c:521) Call Trace: __skb_datagram_iter+0x123/0x8b0 (net/core/datagram.c:402) skb_copy_datagram_iter+0x77/0x1a0 (net/core/datagram.c:534) tipc_recvmsg+0x3d7/0xe80 (net/tipc/socket.c:1934) io_recvmsg+0x47e/0xda0 Fix by changing min_t(int, ...) to min_t(size_t, ...) in both functions. The result is always <= (dlen - offset), which is bounded by TIPC maximum message size (0x1ffff bytes), so the implicit narrowing on assignment to int copy is always safe.
- Published
- Aug 10, 2026
- Updated
- Oct 3, 2026
- EPSS
- 0.2% · 10th percentile
- CWE
- —
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Action score
0
Monitor
Low priority for now.
- CVSS
- 0 / 40 · —
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.2%
Noroxi analysis
No Noroxi analysis for this record yet
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We use this product, ask for helpAffected systems
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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
- 4.12affected
- e9f8b10101c6da3ab000a2fb17162374c9bd2c69 and later · before 9fd4f92671146b068809b6c34b50346cb30cf8f7affected · git
- e9f8b10101c6da3ab000a2fb17162374c9bd2c69 and later · before 93580911f02d1f4a506ec0a6fc4354140c53ffe8affected · git
- e9f8b10101c6da3ab000a2fb17162374c9bd2c69 and later · before 1b6066313b9b8fac870483bf7a26d6bd56579747affected · git
- e9f8b10101c6da3ab000a2fb17162374c9bd2c69 and later · before 7364014fdc289225229eb08de8bcbf4580e78e4daffected · git
- e9f8b10101c6da3ab000a2fb17162374c9bd2c69 and later · before fe9bf32bb18f2d35789d4960fb007d1059bbaa38affected · git
- e9f8b10101c6da3ab000a2fb17162374c9bd2c69 and later · before 47f42ff521b4eeb46e82f9a46a4783a99f7570d7affected · git
- before 4.12not affected · semver
- 6.1.189 and later · up to and including 6.1.*not affected · semver
- 6.6.158 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 | all versions | — |
| Debian:13 | linux | before 6.12.111-1 | 6.12.111-1 |
| Debian:14 | linux | before 7.1.6-1 | 7.1.6-1 |
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
- 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 | 1b6066313b9b8fac870483bf7a26d6bd56579747 | Vendor (CNA) |
| Linux Linux | 47f42ff521b4eeb46e82f9a46a4783a99f7570d7 | Vendor (CNA) |
| Linux Linux | 7364014fdc289225229eb08de8bcbf4580e78e4d | Vendor (CNA) |
| Linux Linux | 93580911f02d1f4a506ec0a6fc4354140c53ffe8 | Vendor (CNA) |
| Linux Linux | 9fd4f92671146b068809b6c34b50346cb30cf8f7 | Vendor (CNA) |
| Linux Linux | fe9bf32bb18f2d35789d4960fb007d1059bbaa38 | Vendor (CNA) |
| 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) |
| debian:linux | 6.12.111-1 · Debian:13 | 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).
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-26-0800 · Aug 11, 2026(Linux Kernel Güvenlik Bildirimi)
Technical details
No CVSS vector for this record, so attack conditions can't be derived.
Weakness class (CWE)
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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/1b6066313b9b8fac870483bf7a26d6bd56579747
- git.kernel.org/stable/c/47f42ff521b4eeb46e82f9a46a4783a99f7570d7
- git.kernel.org/stable/c/7364014fdc289225229eb08de8bcbf4580e78e4d
- git.kernel.org/stable/c/93580911f02d1f4a506ec0a6fc4354140c53ffe8
- git.kernel.org/stable/c/9fd4f92671146b068809b6c34b50346cb30cf8f7
- git.kernel.org/stable/c/fe9bf32bb18f2d35789d4960fb007d1059bbaa38
Vendor advisories and official records. Exploit/PoC links are deliberately left out.