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Review reviewHigh

CVE-2022-48674

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: erofs: fix pcluster use-after-free on UP platforms During stress testing with CONFIG_SMP disabled, KASAN reports as below: ================================================================== BUG: KASAN: use-after-free in __mutex_lock+0xe5/0xc30 Read of size 8 at addr ffff8881094223f8 by task stress/7789 CPU: 0 PID: 7789 Comm: stress Not tainted 6.0.0-rc1-00002-g0d53d2e882f9 #3 Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011 Call Trace: <TASK> .. __mutex_lock+0xe5/0xc30 .. z_erofs_do_read_page+0x8ce/0x1560 .. z_erofs_readah...

CVSS
7.8
EPSS
0.23%
14.1% percentile
CISA KEV
Not listed
Published
2024.05.04
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.23%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: erofs: fix pcluster use-after-free on UP platforms During stress testing with CONFIG_SMP disabled, KASAN reports as below: ================================================================== BUG: KASAN: use-after-free in __mutex_lock+0xe5/0xc30 Read of size 8 at addr ffff8881094223f8 by task stress/7789 CPU: 0 PID: 7789 Comm: stress Not tainted 6.0.0-rc1-00002-g0d53d2e882f9 #3 Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011 Call Trace: <TASK> .. __mutex_lock+0xe5/0xc30 .. z_erofs_do_read_page+0x8ce/0x1560 .. z_erofs_readah...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 73f5c66df3e26ab750cefcb9a3e08c71c9f79cad < 8ddd001cef5e82d19192e6861068463ecca5f556, >= 73f5c66df3e26ab750cefcb9a3e08c71c9f79cad < 94c34faaafe7b55adc2d8d881db195b646959b9e, >= 73f5c66df3e26ab750cefcb9a3e08c71c9f79cad < 2f44013e39984c127c6efedf70e6b5f4e9dcf315, >= 08ec9e6892cc792d7f8fe4d13bd8a0e91fb23488, >= 78c46113413bea1cc345757112aa2642e0f66de5, >= 4.19.26 < 4.20, >= 4.20.13 < 4.21, >= 5.0, >= 4.20.13 < 5.15.68, >= 5.16 < 5.19.9, 6.0
Fixed versions
4.20, 5.15.68, 5.19.9

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