SECUFOCUSNOW
Home›CVE index›CVE-2022-50219
Review reviewHigh

CVE-2022-50219

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix KASAN use-after-free Read in compute_effective_progs Syzbot found a Use After Free bug in compute_effective_progs(). The reproducer creates a number of BPF links, and causes a fault injected alloc to fail, while calling bpf_link_detach on them. Link detach triggers the link to be freed by bpf_link_free(), which calls __cgroup_bpf_detach() and update_effective_progs(). If the memory allocation in this function fails, the function restores the pointer to the bpf_cgroup_link on the cgroup list, but the memory gets fre...

CVSS
7.8
EPSS
0.19%
9.15% percentile
CISA KEV
Not listed
Published
2025.06.18
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.19%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix KASAN use-after-free Read in compute_effective_progs Syzbot found a Use After Free bug in compute_effective_progs(). The reproducer creates a number of BPF links, and causes a fault injected alloc to fail, while calling bpf_link_detach on them. Link detach triggers the link to be freed by bpf_link_free(), which calls __cgroup_bpf_detach() and update_effective_progs(). If the memory allocation in this function fails, the function restores the pointer to the bpf_cgroup_link on the cgroup list, but the memory gets fre...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= af6eea57437a830293eab56246b6025cc7d46ee7 < 3527e3cbb84d8868c4d4e91ba55915f96d39ec3d, >= af6eea57437a830293eab56246b6025cc7d46ee7 < 1f8ca9c40e6222ce431e9ba5dae3cccce8ef9443, >= af6eea57437a830293eab56246b6025cc7d46ee7 < 6336388715afa419cc97d0255bda3bba1b96b7ca, >= af6eea57437a830293eab56246b6025cc7d46ee7 < be001f9da71eaa3b61e186fb88bde3279728bdca, >= af6eea57437a830293eab56246b6025cc7d46ee7 < 4c46091ee985ae84c60c5e95055d779fcd291d87, >= 5.7, >= 5.7 < 5.10.138, >= 5.11 < 5.15.61, >= 5.16 < 5.18.18, >= 5.19 < 5.19.2
Fixed versions
5.10.138, 5.15.61, 5.18.18, 5.19.2

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-416