CVE-2021-47353
udf: Fix NULL pointer dereference in udf_symlink function
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
In the Linux kernel, the following vulnerability has been resolved: udf: Fix NULL pointer dereference in udf_symlink function In function udf_symlink, epos.bh is assigned with the value returned by udf_tgetblk. The function udf_tgetblk is defined in udf/misc.c and returns the value of sb_getblk function that could be NULL. Then, epos.bh is used without any check, causing a possible NULL pointer dereference when sb_getblk fails. This fix adds a check to validate the value of epos.bh.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
2.6.12
References 9
git.kernel.org
- stable/c/2f3d9ddd32a28803baa547e6274983b67d5e287c
- stable/c/371566f63cbd0bb6fbb25b8fe9d5798268d35af9
- stable/c/baea588a42d675e35daeaddd10fbc9700550bc4d
- stable/c/3638705ecd5ad2785e996f820121c0ad15ce64b5
- stable/c/80d505aee6398cf8beb72475c7edcf1733c1c68b
- stable/c/21bf1414580c36ffc8d8de043beb3508cf812238
- stable/c/aebed6b19e51a34003d998da5ebb1dfdd2cb1d02
- stable/c/5150877e4d99f85057a458daac7cd7c01005d5c6
- stable/c/fa236c2b2d4436d9f19ee4e5d5924e90ffd7bb43