CVE-2022-50488 — Use After Free in Linux

CWE-416 — Use After FreeCWE-826 — Premature Release of Resource During Expected Lifetime5 documents5 sources
Severity
7.8HIGHNVD
EPSS
0.0%
top 97.02%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
LinuxLinux KernelDebian Linux
Timeline
PublishedOct 4

Description

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…

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9

Affected Packages4 packages

▶NVDlinux/linux_kernel5.4.198 — 5.5+5
▶Debianlinux/linux_kernel< 5.10.178-1+3
▶CVEListV5linux/linux4dfc12f8c94c8052e975060f595938f75e8b7165 — 5533742c7cb1bc9b1f0bf401cc397d44a3a9e07a+8
▶debiandebian/linux< linux 6.1.4-1 (bookworm)

Patches

Patch: git.kernel.org ↗Patch: git.kernel.org ↗Patch: git.kernel.org ↗

🔴Vulnerability Details

2
OSV
CVE-2022-50488: 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'↗2025-10-04
▶
GHSA
GHSA-ffg4-g8hm-36w4: 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->bi↗2025-10-04
▶

📋Vendor Advisories

2
Red Hat
kernel: block, bfq: fix possible uaf for 'bfqq->bic'↗2025-10-04
▶
Debian
CVE-2022-50488: linux - In the Linux kernel, the following vulnerability has been resolved: block, bfq:...↗2022
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