What’s Vulnerable › Vulnerabilities
CVE-2024-26977: pci_iounmap(): Fix MMIO mapping leak
- Severity: medium (CVSS 5.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2024-05-01 · updated 2026-06-17
Description
In the Linux kernel, the following vulnerability has been resolved: pci_iounmap(): Fix MMIO mapping leak The #ifdef ARCH_HAS_GENERIC_IOPORT_MAP accidentally also guards iounmap(), which means MMIO mappings are leaked. Move the guard so we call iounmap() for MMIO mappings.
Affected products
- Linux kernel: from 5.15.1 before 5.15.154; from 5.16 before 6.1.84; from 6.2 before 6.6.24; from 6.7 before 6.7.12; from 6.8 before 6.8.3; 5.15, 5.15-rc2, 5.15-rc3, 5.15-rc4, 5.15-rc5, 5.15-rc6 (+1) — fixed in 5.15.154, 6.1.84, 6.6.24, 6.7.12, 6.8.3
How to fix
Upgrade to a fixed version: Linux kernel 5.15.154, 6.1.84, 6.6.24, 6.7.12. Check the vendor advisory for mitigations.
References
- https://git.kernel.org/stable/c/5e4b23e7a7b33a1e56bfa3e5598138a2234d55b6
- https://git.kernel.org/stable/c/6d21d0356aa44157a62e39c0d1a13d4c69a8d0c8
- https://git.kernel.org/stable/c/7626913652cc786c238e2dd7d8740b17d41b2637
- https://git.kernel.org/stable/c/af280e137e273935f2e09f4d73169998298792ed
- https://git.kernel.org/stable/c/b5d40f02e7222da032c2042aebcf2a07de9b342f
- https://git.kernel.org/stable/c/f3749345a9b7295dd071d0ed589634cb46364f77
- https://git.kernel.org/stable/c/5e4b23e7a7b33a1e56bfa3e5598138a2234d55b6
- https://git.kernel.org/stable/c/6d21d0356aa44157a62e39c0d1a13d4c69a8d0c8
- https://git.kernel.org/stable/c/7626913652cc786c238e2dd7d8740b17d41b2637
- https://git.kernel.org/stable/c/af280e137e273935f2e09f4d73169998298792ed
- https://git.kernel.org/stable/c/b5d40f02e7222da032c2042aebcf2a07de9b342f
- https://git.kernel.org/stable/c/f3749345a9b7295dd071d0ed589634cb46364f77
Get alerted when CVE-2024-26977 or the next vulnerability affects your stack