net: relax socket state check at accept time.
Noroxi assessment
Priority: Monitor (action score 22/100)
- 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: 0.30% (FIRST EPSS).
- 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.
- Fixed version: Linux Linux 21c14c556cccd0cb54b71ec5e901e64ba84c7165, 26afda78cda3da974fd4c287962c169e9462c495, 4.19.319.
Low priority for now. Upgrade to Linux Linux 21c14c556cccd0cb54b71ec5e901e64ba84c7165, 26afda78cda3da974fd4c287962c169e9462c495, 4.19.319 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: net: relax socket state check at accept time. Christoph reported the following splat: WARNING: CPU: 1 PID: 772 at net/ipv4/af_inet.c:761 __inet_accept+0x1f4/0x4a0 Modules linked in: CPU: 1 PID: 772 Comm: syz-executor510 Not tainted 6.9.0-rc7-g7da7119fe22b #56 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.11.0-2.el7 04/01/2014 RIP: 0010:__inet_accept+0x1f4/0x4a0 net/ipv4/af_inet.c:759 Code: 04 38 84 c0 0f 85 87 00 00 00 41 c7 04 24 03 00 00 00 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc e8 ec b7 da fd <0f> 0b e9 7f fe ff ff e8 e0 b7 da fd 0f 0b e9 fe fe ff ff 89 d9 80 RSP: 0018:ffffc90000c2fc58 EFLAGS: 00010293 RAX: ffffffff836bdd14 RBX: 0000000000000000 RCX: ffff888104668000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: dffffc0000000000 R08: ffffffff836bdb89 R09: fffff52000185f64 R10: dffffc0000000000 R11: fffff52000185f64 R12: dffffc0000000000 R13: 1ffff92000185f98 R14: ffff88810754d880 R15: ffff8881007b7800 FS: 000000001c772880(0000) GS:ffff88811b280000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb9fcf2e178 CR3: 00000001045d2002 CR4: 0000000000770ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: <TASK> inet_accept+0x138/0x1d0 net/ipv4/af_inet.c:786 do_accept+0x435/0x620 net/socket.c:1929 __sys_accept4_file net/socket.c:1969 [inline] __sys_accept4+0x9b/0x110 net/socket.c:1999 __do_sys_accept net/socket.c:2016 [inline] __se_sys_accept net/socket.c:2013 [inline] __x64_sys_accept+0x7d/0x90 net/socket.c:2013 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x58/0x100 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x4315f9 Code: fd ff 48 81 c4 80 00 00 00 e9 f1 fe ff ff 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 ab b4 fd ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffdb26d9c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002b RAX: ffffffffffffffda RBX: 0000000000400300 RCX: 00000000004315f9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00000000006e1018 R08: 0000000000400300 R09: 0000000000400300 R10: 0000000000400300 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000040cdf0 R14: 000000000040ce80 R15: 0000000000000055 </TASK> The reproducer invokes shutdown() before entering the listener status. After commit 94062790aedb ("tcp: defer shutdown(SEND_SHUTDOWN) for TCP_SYN_RECV sockets"), the above causes the child to reach the accept syscall in FIN_WAIT1 status. Eric noted we can relax the existing assertion in __inet_accept()
- Published
- Jun 21, 2024
- Updated
- Oct 15, 2026
- EPSS
- 0.3% · 21th percentile
- CWE
- —
Report tools
Action score
22
Monitor
Low priority for now.
- CVSS
- 22 / 40 · 5.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.3%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
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.
| 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 kernel4.19.314 and later · before 4.19.319
- linux linux kernel5.4.276 and later · before 5.4.281
- linux linux kernel5.10.217 and later · before 5.10.223
- linux linux kernel5.15.159 and later · before 5.15.164
- linux linux kernel6.1.91 and later · before 6.1.93
- linux linux kernel6.6.31 and later · before 6.6.33
- linux linux kernel6.8.10 and later · before 6.9
- linux linux kernel6.9.1 and later · before 6.9.4
- linux linux kernel6.9
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
- cbf232ba11bc86a5281b4f00e1151349ef4d45cf, 6.9affected
- 34e41a031fd7523bf1cd00a2adca2370aebea270 and later · before 7de00adc9bd035d861ba4177848ca0bfa5ed1e04affected · git
- ed5e279b69e007ce6c0fe82a5a534c1b19783214 and later · before 59801e88c99f7c3f44a4d20af6ba6417aa359b5daffected · git
- 413c33b9f3bc36fdf719690a78824db9f88a9485 and later · before 6e03006548c66b979f4e5e9fc797aac4dad82822affected · git
- 2552c9d9440f8e7a2ed0660911ff00f25b90a0a4 and later · before 21c14c556cccd0cb54b71ec5e901e64ba84c7165affected · git
- 3fe4ef0568a48369b1891395d13ac593b1ba41b1 and later · before c09ddc605893df542c6cf8dde6a57a93f7cf0adbaffected · git
- f47d0d32fa94e815fdd78b8b88684873e67939f4 and later · before 87bdc9f6f58b4417362d6932b49b828e319f97dcaffected · git
- 94062790aedb505bdda209b10bea47b294d6394f and later · before 5f9a04a94fd1894d7009055ab8e5832a0242dba3affected · git
- 94062790aedb505bdda209b10bea47b294d6394f and later · before 26afda78cda3da974fd4c287962c169e9462c495affected · git
- 4.19.314 and later · before 4.19.319affected · semver
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:11 | linux | before 5.10.223-1 | 5.10.223-1 |
| Debian:12 | linux | before 6.1.94-1 | 6.1.94-1 |
| Debian:13 | linux | before 6.9.7-1 | 6.9.7-1 |
| SUSE:Linux Enterprise Live Patching 12 SP5 | kernel-default | before 4.12.14-122.244.1 | 4.12.14-122.244.1 |
| SUSE:Linux Enterprise Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_64 | before 1-8.5.1 | 1-8.5.1 |
| SUSE:Linux Enterprise Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5-RT_Update_23 | before 1-150500.11.3.1 | 1-150500.11.3.1 |
| SUSE:Linux Enterprise Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5-RT_Update_23 | before 1-150500.11.3.1 | 1-150500.11.3.1 |
| SUSE:Linux Enterprise Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6-RT_Update_6 | before 1-150600.1.3.1 | 1-150600.1.3.1 |
| SUSE:Linux Enterprise Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6-RT_Update_6 | before 1-150600.1.3.1 | 1-150600.1.3.1 |
| SUSE:Linux Enterprise Micro 5.5 | kernel-rt | before 5.14.21-150500.13.79.1 | 5.14.21-150500.13.79.1 |
| SUSE:Linux Enterprise Micro 5.5 | kernel-rt | before 5.14.21-150500.13.79.1 | 5.14.21-150500.13.79.1 |
| SUSE:Linux Enterprise Micro 5.5 | kernel-source-rt | before 5.14.21-150500.13.79.1 | 5.14.21-150500.13.79.1 |
| SUSE:Linux Enterprise Micro 5.5 | kernel-source-rt | before 5.14.21-150500.13.79.1 | 5.14.21-150500.13.79.1 |
| SUSE:Linux Enterprise Module for Public Cloud 15 SP5 | kernel-azure | before 5.14.21-150500.33.75.1 | 5.14.21-150500.33.75.1 |
| SUSE:Linux Enterprise Module for Public Cloud 15 SP5 | kernel-azure | before 5.14.21-150500.33.75.1 | 5.14.21-150500.33.75.1 |
| SUSE:Linux Enterprise Module for Public Cloud 15 SP5 | kernel-source-azure | before 5.14.21-150500.33.75.1 | 5.14.21-150500.33.75.1 |
| SUSE:Linux Enterprise Module for Public Cloud 15 SP5 | kernel-source-azure | before 5.14.21-150500.33.75.1 | 5.14.21-150500.33.75.1 |
| SUSE:Linux Enterprise Module for Public Cloud 15 SP5 | kernel-syms-azure | before 5.14.21-150500.33.75.1 | 5.14.21-150500.33.75.1 |
| SUSE:Linux Enterprise Module for Public Cloud 15 SP5 | kernel-syms-azure | before 5.14.21-150500.33.75.1 | 5.14.21-150500.33.75.1 |
| SUSE:Linux Enterprise Module for Public Cloud 15 SP6 | kernel-azure | before 6.4.0-150600.8.20.1 | 6.4.0-150600.8.20.1 |
| SUSE:Linux Enterprise Module for Public Cloud 15 SP6 | kernel-azure | before 6.4.0-150600.8.20.1 | 6.4.0-150600.8.20.1 |
| SUSE:Linux Enterprise Module for Public Cloud 15 SP6 | kernel-source-azure | before 6.4.0-150600.8.20.1 | 6.4.0-150600.8.20.1 |
| SUSE:Linux Enterprise Module for Public Cloud 15 SP6 | kernel-source-azure | before 6.4.0-150600.8.20.1 | 6.4.0-150600.8.20.1 |
| SUSE:Linux Enterprise Module for Public Cloud 15 SP6 | kernel-syms-azure | before 6.4.0-150600.8.20.1 | 6.4.0-150600.8.20.1 |
+15
Same product
linux: all recordsOther highest-scoring records for the same primary product.
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- 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 | 21c14c556cccd0cb54b71ec5e901e64ba84c7165 | Vendor (CNA) |
| Linux Linux | 26afda78cda3da974fd4c287962c169e9462c495 | Vendor (CNA) |
| Linux Linux | 4.19.319 | Vendor (CNA) |
| Linux Linux | 5.10.223 | Vendor (CNA) |
| Linux Linux | 5.15.164 | Vendor (CNA) |
| Linux Linux | 5.4.281 | Vendor (CNA) |
| Linux Linux | 59801e88c99f7c3f44a4d20af6ba6417aa359b5d | Vendor (CNA) |
| Linux Linux | 5f9a04a94fd1894d7009055ab8e5832a0242dba3 | Vendor (CNA) |
| Linux Linux | 6.1.93 | Vendor (CNA) |
| Linux Linux | 6.6.33 | Vendor (CNA) |
| Linux Linux | 6.9 | Vendor (CNA) |
| Linux Linux | 6e03006548c66b979f4e5e9fc797aac4dad82822 | Vendor (CNA) |
| Linux Linux | 7de00adc9bd035d861ba4177848ca0bfa5ed1e04 | Vendor (CNA) |
| Linux Linux | 87bdc9f6f58b4417362d6932b49b828e319f97dc | Vendor (CNA) |
| Linux Linux | c09ddc605893df542c6cf8dde6a57a93f7cf0adb | Vendor (CNA) |
| debian:linux | 6.1.94-1 · Debian:12 | Package registry (OSV) |
| opensuse:kernel-rt | 6.4.0-150600.10.20.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| opensuse:kernel-rt_debug | 6.4.0-150600.10.20.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| opensuse:kernel-source-rt | 6.4.0-150600.10.20.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| opensuse:kernel-syms-rt | 6.4.0-150600.10.20.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| suse:kernel-azure | 6.4.0-150600.8.20.1 · SUSE:Linux Enterprise Module for Public Cloud 15 SP6 | Package registry (OSV) |
| suse:kernel-livepatch-SLE15-SP5-RT_Update_23 | 1-150500.11.3.1 · SUSE:Linux Enterprise Live Patching 15 SP5 | Package registry (OSV) |
| suse:kernel-livepatch-SLE15-SP6-RT_Update_6 | 1-150600.1.3.1 · SUSE:Linux Enterprise Live Patching 15 SP6 | Package registry (OSV) |
| suse:kernel-rt | 6.4.0-150600.10.20.1 · SUSE:Real Time Module 15 SP6 | Package registry (OSV) |
| suse:kernel-rt_debug | 6.4.0-150600.10.20.1 · SUSE:Real Time Module 15 SP6 | Package registry (OSV) |
| suse:kernel-source-azure | 6.4.0-150600.8.20.1 · SUSE:Linux Enterprise Module for Public Cloud 15 SP6 | Package registry (OSV) |
| suse:kernel-source-rt | 6.4.0-150600.10.20.1 · SUSE:Real Time Module 15 SP6 | Package registry (OSV) |
| suse:kernel-syms-rt | 6.4.0-150600.10.20.1 · SUSE:Real Time Module 15 SP6 | 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
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
—
CVSS vector
CVSS:3.1/AV:L/AC:L/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.
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 (11 more)Show less
- git.kernel.org/stable/c/26afda78cda3da974fd4c287962c169e9462c495
- git.kernel.org/stable/c/59801e88c99f7c3f44a4d20af6ba6417aa359b5d
- git.kernel.org/stable/c/5f9a04a94fd1894d7009055ab8e5832a0242dba3
- git.kernel.org/stable/c/6e03006548c66b979f4e5e9fc797aac4dad82822
- git.kernel.org/stable/c/7de00adc9bd035d861ba4177848ca0bfa5ed1e04
- git.kernel.org/stable/c/87bdc9f6f58b4417362d6932b49b828e319f97dc
- git.kernel.org/stable/c/c09ddc605893df542c6cf8dde6a57a93f7cf0adb
- cert-portal.siemens.com/productcert/html/ssa-265688.html
- cert-portal.siemens.com/productcert/html/ssa-355557.html
- cert-portal.siemens.com/productcert/html/ssa-398330.html
- cert-portal.siemens.com/productcert/html/ssa-613116.html
Vendor advisories and official records. Exploit/PoC links are deliberately left out.