vulnerability
Ubuntu: (Multiple Advisories) (CVE-2021-47353): Linux kernel vulnerabilities
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:L/AC:L/Au:S/C:N/I:N/A:C) | May 21, 2024 | Nov 19, 2024 | Aug 18, 2025 |
Severity
5
CVSS
(AV:L/AC:L/Au:S/C:N/I:N/A:C)
Published
May 21, 2024
Added
Nov 19, 2024
Modified
Aug 18, 2025
Description
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.
Solutions
ubuntu-upgrade-linux-image-4-4-0-1114-fipsubuntu-upgrade-linux-image-4-4-0-1144-awsubuntu-upgrade-linux-image-4-4-0-1145-kvmubuntu-upgrade-linux-image-4-4-0-1182-awsubuntu-upgrade-linux-image-4-4-0-269-genericubuntu-upgrade-linux-image-4-4-0-269-lowlatencyubuntu-upgrade-linux-image-awsubuntu-upgrade-linux-image-fipsubuntu-upgrade-linux-image-genericubuntu-upgrade-linux-image-generic-lts-xenialubuntu-upgrade-linux-image-kvmubuntu-upgrade-linux-image-lowlatencyubuntu-upgrade-linux-image-lowlatency-lts-xenialubuntu-upgrade-linux-image-virtualubuntu-upgrade-linux-image-virtual-lts-xenial
References
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