CVE-2011-2928 json
The befs_follow_link function in fs/befs/linuxvfs.c in the Linux kernel before 3.1-rc3 does not validate the length attribute of long symli…
published 2011-08-29 15 y ago modified 2026-06-16 4 mo ago also EUVD-2011-2901
- cvss
- 4.9
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 43%
- public exploits
- 0
- none known
Summary
The befs_follow_link function in fs/befs/linuxvfs.c in the Linux kernel before 3.1-rc3 does not validate the length attribute of long symlinks, which allows local users to cause a denial of service (incorrect pointer dereference and OOPS) by accessing a long symlink on a malformed Be filesystem.
Patch / fix
- linux linux_kernel 3.1
Exploit prediction
0.51% chance of exploitation in the next 30 days, higher than 43% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- openwall.com http://www.openwall.com/lists/oss-security/2011/08/19/5 referenced PoC, tagged "exploit" by a source, unverified
- openwall.com http://www.openwall.com/lists/oss-security/2011/08/19/1 referenced PoC, tagged "exploit" by a source, unverified
- pre-cert.de http://www.pre-cert.de/advisories/PRE-SA-2011-06.txt referenced PoC, tagged "exploit" by a source, unverified
- securityfocus.com http://www.securityfocus.com/archive/1/519387/100/0/threaded referenced PoC, tagged "exploit" by a source, unverified
- securityreason.com http://securityreason.com/securityalert/8360 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 4.9 | AV:L/AC:L/Au:N/C:N/I:N/A:C |
Classification
- Weakness
-
- CWE-476 NULL Pointer Dereference
- Technology feeds
References
-
openwall.com
/lists/oss-security/2011/08/19/5
mailing-list, exploit, patch, third-party-advisory
-
openwall.com
/lists/oss-security/2011/08/19/1
mailing-list, exploit, patch, third-party-advisory
-
pre-cert.de
/advisories/PRE-SA-2011-06.txt
exploit, third-party-advisory
-
securityfocus.com
/archive/1/519387/100/0/threaded
mailing-list, exploit, third-party-advisory, vdb-entry
-
securityreason.com
/securityalert/8360
third-party-advisory, exploit
-
securityfocus.com
/bid/49256
vdb-entry, third-party-advisory
- git.kernel.org /?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=338d0f0a6fbc82407864606f5b64b75aeb3c70f2
-
exchange.xforce.ibmcloud.com
/vulnerabilities/69343
vdb-entry, third-party-advisory
-
kernel.org
/pub/linux/kernel/v3.0/testing/ChangeLog-3.1-rc3
broken-link
Sources
- CVE List CVE-2011-2928
- NVD CVE-2011-2928
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