CVE-2011-2928: linux linux_kernel NULL Pointer Dereference
Vulnerability summary
CVE-2011-2928 is a medium (CVSS 4.9) NULL Pointer Dereference vulnerability in linux linux_kernel. EPSS estimates a 0.51% chance of exploitation in the next 30 days, higher than 43.2% of scored vulnerabilities. 5 public exploits are recorded.
Not severe (CVSS 4.9, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 2Timeline
- 29-08-2011PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
1 score · 1 source · 1 versionEPSS trend
Probability
0.51%
Chance of exploitation in the next 30 days
Percentile
43%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.51% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
5 foundExploit Reference (openwall.com)
Maturity: unknown
Exploit Reference (pre-cert.de)
Maturity: unknown
Exploit Reference (openwall.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, no authentication (CVSS vector). Other conditions: not stated in public data.
Linux1 product
- linux_kernel< 3.1 | 3.1 | 3.1:rc1 | 3.1:rc2
1 vendor · 1 product
References
9 links- www.openwall.com/lists/oss-security/2011/08/19/5Mailing ListX Refsource MLISTExploitPatchThird Party Advisory
- www.openwall.com/lists/oss-security/2011/08/19/1Mailing ListX Refsource MLISTExploitPatchThird Party Advisory
- www.securityfocus.com/archive/1/519387/100/0/threadedMailing ListX Refsource BUGTRAQExploitThird Party AdvisoryVDB Entry
- git.kernel.orgX Refsource CONFIRM