Double Free in Linux

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 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]

Vulnerability class: Double Free

Published · last modified .

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.002 (14.2th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 14.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2022-48740: held from 0.002 to 0.002.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

  • Linux — versions 60abd3181db29ea81742106cc0ac2e27fd05b418, 5.7, 0
  • Linux Kernel — versions 5.17

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2022-48740?
CVE-2022-48740 is a high-severity vulnerability in Linux, classified under Double Free. CVSS score: 7.8/10. Published 2024-06-20.
How severe is CVE-2022-48740?
High severity. CVSS v3 base score is 7.8 out of 10.