CVE-2022-48740
In the Linux kernel, the following vulnerability has been resolved: selinux: fix double free of cond_list on error paths On error path from cond_read_list() and duplicate_policydb_cond_list() the cond_list_destroy() gets called a second time in caller…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.24%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In the Linux kernel, the following vulnerability has been resolved: selinux: fix double free of cond_list on error paths On error path from cond_read_list() and duplicate_policydb_cond_list() the cond_list_destroy() gets called a second time in caller functions, resulting in NULL pointer deref. Fix this by resetting the cond_list_len to 0 in cond_list_destroy(), making subsequent calls a noop. Also consistently reset the cond_list pointer to NULL after freeing. [PM: fix line lengths in the description]
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.24% probability · 16th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-415
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/186edf7e368c40d06cf727a1ad14698ea67b74adPatch
- https://git.kernel.org/stable/c/70caa32e6d81f45f0702070c0e4dfe945e92fbd7Patch
- https://git.kernel.org/stable/c/7ed9cbf7ac0d4ed86b356e1b944304ae9ee450d4Patch
- https://git.kernel.org/stable/c/f446089a268c8fc6908488e991d28a9b936293dbPatch
- https://git.kernel.org/stable/c/186edf7e368c40d06cf727a1ad14698ea67b74adPatch
- https://git.kernel.org/stable/c/70caa32e6d81f45f0702070c0e4dfe945e92fbd7Patch
- https://git.kernel.org/stable/c/7ed9cbf7ac0d4ed86b356e1b944304ae9ee450d4Patch
- https://git.kernel.org/stable/c/f446089a268c8fc6908488e991d28a9b936293dbPatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.