CVE-2023-53484 — Use After Free in Linux

CWE-416 — Use After FreeCWE-664 — Improper Control of a Resource Through its Lifetime5 documents5 sources
Severity
7.8HIGHNVD
EPSS
0.0%
top 96.83%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
LinuxLinux KernelDebian Linux
Timeline
PublishedOct 1

Description

In the Linux kernel, the following vulnerability has been resolved: lib: cpu_rmap: Avoid use after free on rmap->obj array entries When calling irq_set_affinity_notifier() with NULL at the notify argument, it will cause freeing of the glue pointer in the corresponding array entry but will leave the pointer in the array. A subsequent call to free_irq_cpu_rmap() will try to free this entry again leading to possible use after free. Fix that by setting NULL to the array entry and checking that we…

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_kernel3.8.1 — 4.14.316+7
▶Debianlinux/linux_kernel< 5.10.191-1+3
▶CVEListV5linux/linux896f97ea95c1d29c0520ee0766b66b7f64cb967c — 981f339d2905b6a92ef59358158b326493aecac5+8
▶debiandebian/linux< linux 6.1.37-1 (bookworm)

Patches

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

🔴Vulnerability Details

2
OSV
CVE-2023-53484: In the Linux kernel, the following vulnerability has been resolved: lib: cpu_rmap: Avoid use after free on rmap->obj array entries When calling irq_se↗2025-10-01
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GHSA
GHSA-9598-2w9x-r9v4: In the Linux kernel, the following vulnerability has been resolved: lib: cpu_rmap: Avoid use after free on rmap->obj array entries When calling irq_↗2025-10-01
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📋Vendor Advisories

2
Red Hat
kernel: lib: cpu_rmap: Avoid use after free on rmap->obj array entries↗2025-10-01
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Debian
CVE-2023-53484: linux - In the Linux kernel, the following vulnerability has been resolved: lib: cpu_rm...↗2023
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