Review reviewHigh

CVE-2022-50488

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: block, bfq: fix possible uaf for 'bfqq->bic' Our test report a uaf for 'bfqq->bic' in 5.10: ================================================================== BUG: KASAN: use-after-free in bfq_select_queue+0x378/0xa30 CPU: 6 PID: 2318352 Comm: fsstress Kdump: loaded Not tainted 5.10.0-60.18.0.50.h602.kasan.eulerosv2r11.x86_64 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.1-0-ga5cab58-20220320_160524-szxrtosci10000 04/01/2014 Call Trace: bfq_select_queue+0x378/0xa30 bfq_dispatch_request+0xe8/0x130 b...

CVSS: 7.8
EPSS: 0.15%
CISA KEV: Not listed
Published: 2025.10.05

PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability0.15%

Technical severityCVSS 7.8

Vulnerability overview

Affected product and versions

Product: Linux Linux, linux kernel
Affected versions: >= 4dfc12f8c94c8052e975060f595938f75e8b7165 < 5533742c7cb1bc9b1f0bf401cc397d44a3a9e07a, >= 81b7d0c717a487ec50e2924a773ff501ee40f0d5 < 094f3d9314d67691cb21ba091c1b528f6e3c4893, >= 3bc5e683c67d94bd839a1da2e796c15847b51b69 < b22fd72bfebda3956efc4431b60ddfc0a51e03e0, >= 3bc5e683c67d94bd839a1da2e796c15847b51b69 < 761564d93c8265f65543acf0a576b32d66bfa26a, >= 3bc5e683c67d94bd839a1da2e796c15847b51b69 < 64dc8c732f5c2b406cc752e6aaa1bd5471159cab, >= 31326bf551269fb9bafa84ca99172b8340e5d8f8, >= 43c51b86dbe551cff5d39b88aa2f41d29479f9c4, >= 8615f6c0c9e7cf0ca90b6b5408784d797cbe5621, >= 5.10.121 < 5.10.175, >= 5.15.46 < 5.15.86, >= 5.4.198 < 5.5, >= 5.17.14 < 5.18, >= 5.18.3 < 5.19, >= 5.19, >= 5.18.3 < 6.0.16, >= 6.1 < 6.1.2
Fixed versions: 5.5, 5.10.175, 5.15.86, 5.18, 6.0.16, 6.1.2

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that Linux Linux, linux kernel and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
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