CVE-2021-47353
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.
Does this matter?
Lower severity and a low EPSS score (0.31%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.31% probability · 24th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/21bf1414580c36ffc8d8de043beb3508cf812238Patch
- https://git.kernel.org/stable/c/2f3d9ddd32a28803baa547e6274983b67d5e287cPatch
- https://git.kernel.org/stable/c/3638705ecd5ad2785e996f820121c0ad15ce64b5Patch
- https://git.kernel.org/stable/c/371566f63cbd0bb6fbb25b8fe9d5798268d35af9Patch
- https://git.kernel.org/stable/c/5150877e4d99f85057a458daac7cd7c01005d5c6Patch
- https://git.kernel.org/stable/c/80d505aee6398cf8beb72475c7edcf1733c1c68bPatch
- https://git.kernel.org/stable/c/aebed6b19e51a34003d998da5ebb1dfdd2cb1d02Patch
- https://git.kernel.org/stable/c/baea588a42d675e35daeaddd10fbc9700550bc4dPatch
- https://git.kernel.org/stable/c/fa236c2b2d4436d9f19ee4e5d5924e90ffd7bb43Patch
- https://git.kernel.org/stable/c/21bf1414580c36ffc8d8de043beb3508cf812238Patch
- https://git.kernel.org/stable/c/2f3d9ddd32a28803baa547e6274983b67d5e287cPatch
- https://git.kernel.org/stable/c/3638705ecd5ad2785e996f820121c0ad15ce64b5Patch
- https://git.kernel.org/stable/c/371566f63cbd0bb6fbb25b8fe9d5798268d35af9Patch
- https://git.kernel.org/stable/c/5150877e4d99f85057a458daac7cd7c01005d5c6Patch
- https://git.kernel.org/stable/c/80d505aee6398cf8beb72475c7edcf1733c1c68bPatch
- https://git.kernel.org/stable/c/aebed6b19e51a34003d998da5ebb1dfdd2cb1d02Patch
- https://git.kernel.org/stable/c/baea588a42d675e35daeaddd10fbc9700550bc4dPatch
- https://git.kernel.org/stable/c/fa236c2b2d4436d9f19ee4e5d5924e90ffd7bb43Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.