CVE-2024-26947: linux
Vulnerability summary
CVE-2024-26947 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.23% chance of exploitation in the next 30 days, higher than 12.8% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 22 · Related 19Timeline
- 01-05-2024PublishedVulnerability first disclosed.
- 23-05-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: ARM: 9359/1: flush: check if the folio is reserved for no-mapping addresses Since commit a4d5613c4dc6 ("arm: extend pfn_valid to take into account freed memory map alignment") changes the semantics of pfn_valid() to check presence of the memory map for a PFN. A valid page for an address which is reserved but not mapped by the kernel[1], the system crashed during some uio test with the following memory layout: node 0: [mem 0x00000000c0a00000-0x00000000cc8fffff] node 0: [mem 0x00000000d0000000-0x00000000da1fffff] the uio layout is：0xc0900000, 0x100000 the crash backtrace like: Unable to handle kernel paging request at virtual address bff00000 [...] CPU: 1 PID: 465 Comm: startapp.bin Tainted: G O 5.10.0 #1 Hardware name: Generic DT based system PC is at b15_flush_kern_dcache_area+0x24/0x3c LR is at __sync_icache_dcache+0x6c/0x98 [...] (b15_flush_kern_dcache_area) from (__sync_icache_dcache+0x6c/0x98) (__sync_icache_dcache) from (set_pte_at+0x28/0x54) (set_pte_at) from (remap_pfn_range+0x1a0/0x274) (remap_pfn_range) from (uio_mmap+0x184/0x1b8 [uio]) (uio_mmap [uio]) from (__mmap_region+0x264/0x5f4) (__mmap_region) from (__do_mmap_mm+0x3ec/0x440) (__do_mmap_mm) from (do_mmap+0x50/0x58) (do_mmap) from (vm_mmap_pgoff+0xfc/0x188) (vm_mmap_pgoff) from (ksys_mmap_pgoff+0xac/0xc4) (ksys_mmap_pgoff) from (ret_fast_syscall+0x0/0x5c) Code: e0801001 e2423001 e1c00003 f57ff04f (ee070f3e) ---[ end trace 09cf0734c3805d52 ]--- Kernel panic - not syncing: Fatal exception So check if PG_reserved was set to solve this issue. [1]: https://lore.kernel.org/lkml/Zbtdue57RO0QScJM@linux.ibm.com/
CVSS metrics
3 scores · 3 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.23%
Chance of exploitation in the next 30 days
Percentile
13%
Versus all other CVEs
30-day change
0.00 pp
From 0.23% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Ubuntu113 products
- linux< 5.4.0-202.222 | < 5.15.0-127.137 | < 6.8.0-35.35
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 5.4.0-1136.146 | < 5.15.0-1073.79 | < 6.8.0-1009.9
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ a4d5613c4dc6d413e0733e37db9d116a2a36b9f3, < 0c027c2bad7f5111c51a358b5d392e1a695dabff | ≥ a4d5613c4dc6d413e0733e37db9d116a2a36b9f3, < 9f7ddc222cae8254e93d5c169a8ae11a49d912a7 | ≥ a4d5613c4dc6d413e0733e37db9d116a2a36b9f3, < fb3a122a978626b33de3367ee1762da934c0f512 | ≥ a4d5613c4dc6d413e0733e37db9d116a2a36b9f3, < 0c66c6f4e21cb22220cbd8821c5c73fc157d20dc | 6026d4032dbbe3d7f4ac2c8daa923fe74dcf41c4 | 65c578935bcc26ddc04e6757b2c7be95bf235b31 | ≥ 5.4.167, < 5.5 | ≥ 5.10.87, < 5.11 | 5.14
- linux_kernel≥ 5.4.167, < 5.5 | ≥ 5.10.87, < 5.11 | ≥ 5.14, < 6.6.24 | ≥ 6.7, < 6.7.12 | ≥ 6.8, < 6.8.3
Debian1 product
- linuxAll versions (No fix recorded) | < 6.7.12-1
3 vendors · 116 products
