7.8

CVE-2022-48740

selinux: fix double free of cond_list on error paths

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]
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 5.7 < 5.10.99
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.22
Linux ≫ Linux Kernel Version >= 5.16 < 5.16.8
Linux ≫ Linux Kernel Version5.17 Updaterc1
Linux ≫ Linux Kernel Version5.17 Updaterc2
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.25% 0.154
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-415 Double Free

The product calls free() twice on the same memory address.

https://git.kernel.org/stable/c/186edf7e368c40d06cf727a1ad14698ea67b74ad
Patch
https://git.kernel.org/stable/c/70caa32e6d81f45f0702070c0e4dfe945e92fbd7
Patch
https://git.kernel.org/stable/c/7ed9cbf7ac0d4ed86b356e1b944304ae9ee450d4
Patch
https://git.kernel.org/stable/c/f446089a268c8fc6908488e991d28a9b936293db
Patch