CVE-2009-1243 json
net/ipv4/udp.c in the Linux kernel before 2.6.29.1 performs an unlocking step in certain incorrect circumstances, which allows local users…
published 2009-04-06 17 y ago modified 2026-06-16 4 mo ago also EUVD-2009-1242
- cvss
- 5.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 18%
- public exploits
- 0
- none known
Summary
net/ipv4/udp.c in the Linux kernel before 2.6.29.1 performs an unlocking step in certain incorrect circumstances, which allows local users to cause a denial of service (panic) by reading zero bytes from the /proc/net/udp file and unspecified other files, related to the "udp seq_file infrastructure."
Patch / fix
- linux linux_kernel 2.6.29.1
Exploit prediction
0.27% chance of exploitation in the next 30 days, higher than 18% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 2.1 | AV:L/AC:L/Au:N/C:N/I:N/A:P |
Classification
- Weakness
-
- CWE-667 Improper Locking
- Technology feeds
References
-
openwall.com
/lists/oss-security/2009/04/01/4
mailing-list, patch, third-party-advisory
-
securityfocus.com
/bid/34329
vdb-entry, broken-link, patch, third-party-advisory
-
vigilance.fr
/vulnerability/Linux-kernel-denial-of-service-via-proc-net-udp-8586
patch, third-party-advisory
-
kernel.org
/pub/linux/kernel/v2.6/ChangeLog-2.6.29.1
broken-link
-
secunia.com
/advisories/34478
third-party-advisory, broken-link
-
exchange.xforce.ibmcloud.com
/vulnerabilities/49595
vdb-entry, third-party-advisory
-
git.kernel.org
/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=30842f2989aacfaba3ccb39829b3417be9313dbe
broken-link
-
vupen.com
/english/advisories/2009/0924
vdb-entry, broken-link, third-party-advisory
Sources
- CVE List CVE-2009-1243
- NVD CVE-2009-1243
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