CVE-2022-49444: module: fix [e_shstrndx].sh_size=0 OOB access

Severity: high (CVSS 7.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-02-26 · updated 2026-06-17
Weakness: CWE-125

Description

In the Linux kernel, the following vulnerability has been resolved: module: fix [e_shstrndx].sh_size=0 OOB access It is trivial to craft a module to trigger OOB access in this line: if (info->secstrings[strhdr->sh_size - 1] != '\0') { BUG: unable to handle page fault for address: ffffc90000aa0fff PGD 100000067 P4D 100000067 PUD 100066067 PMD 10436f067 PTE 0 Oops: 0000 [#1] PREEMPT SMP PTI CPU: 7 PID: 1215 Comm: insmod Not tainted 5.18.0-rc5-00007-g9bf578647087-dirty #10 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-4.fc34 04/01/2014 RIP: 0010:load_module+0x19b/0x2391 [rebased patch onto modules-next]

Affected products

Linux kernel: from 5.4.110 before 5.5; from 5.10.26 before 5.11; from 5.11.3 before 5.15.54; from 5.16 before 5.17.14; from 5.18 before 5.18.3 — fixed in 5.11, 5.15.54, 5.17.14, 5.18.3, 5.5

How to fix

Upgrade to a fixed version: Linux kernel 5.11, 5.15.54, 5.17.14, 5.18.3. Check the vendor advisory for mitigations.

References

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