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Fencer Vulns
medium 5.5

CVE-2024-26947 json

ARM: 9359/1: flush: check if the folio is reserved for no-mapping addresses

published 2024-05-01 2 y ago modified 2026-10-30 10 d ago also EUVD-2024-24209

cvss
5.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 13%
public exploits
0
none known

Summary

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/

Patch / fix

  • Linux Linux 5.5, 5.11, 6.1.191, 6.6.24, 6.7.12, 6.8.3, 6.9
  • linux Debian 14, Debian 13 6.7.12-1

debian advisories DEBIAN-CVE-2024-26947

  • linux Ubuntu 20.04 LTS 5.4.0-202.222
  • linux Ubuntu 22.04 LTS 5.15.0-127.137
  • linux Ubuntu 24.04 LTS 6.8.0-35.35
  • linux-aws Ubuntu 20.04 LTS 5.4.0-1136.146
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1073.79
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1009.9
  • linux-gcp Ubuntu 20.04 LTS 5.4.0-1140.149
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1072.80

ubuntu advisories UBUNTU-CVE-2024-26947

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel RHEL 9 5.14.0-427.37.1.el9_4
  • rv RHEL 9 5.14.0-427.37.1.el9_4
  • perf RHEL 9 5.14.0-427.37.1.el9_4
  • rtla RHEL 9 5.14.0-427.37.1.el9_4
  • bpftool RHEL 9 7.3.0-427.37.1.el9_4
  • libperf RHEL 9 5.14.0-427.37.1.el9_4
  • kernel-rt RHEL 9 5.14.0-427.37.1.el9_4
  • kernel-64k RHEL 9 5.14.0-427.37.1.el9_4

red hat advisories RHSA-2024:6997RHSA-2024:5066RHSA-2024:5067

  • kernel AlmaLinux 9 5.14.0-427.37.1.el9_4
  • rv AlmaLinux 9 5.14.0-427.37.1.el9_4
  • perf AlmaLinux 9 5.14.0-427.37.1.el9_4
  • rtla AlmaLinux 9 5.14.0-427.37.1.el9_4
  • bpftool AlmaLinux 9 7.3.0-427.37.1.el9_4
  • libperf AlmaLinux 9 5.14.0-427.37.1.el9_4
  • kernel-rt AlmaLinux 9 5.14.0-427.37.1.el9_4
  • kernel-64k AlmaLinux 9 5.14.0-427.37.1.el9_4

almalinux advisories ALSA-2024:6997

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-26947 updated cvss 5.5

kernel: ARM: 9359/1: flush: check if the folio is reserved for no-mapping addresses

  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 9 kernel-rt, kernel-rt-kvm, kernel-rt-core, kernel-rt-modules, kernel-rt-debug-kvm, kernel-rt-debug-core, +12 more
    affected: no fix available
  • Red Hat CodeReady Linux Builder EUS (v.9.2) kernel-debuginfo-common-s390x 5.14.0-284.77.1.el9_2, kernel-debuginfo-common-x86_64 5.14.0-284.77.1.el9_2, kernel-debuginfo-common-aarch64 5.14.0-284.77.1.el9_2, kernel-debuginfo-common-ppc64le 5.14.0-284.77.1.el9_2
    fixed: vendor fix RHSA-2024:5066
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-427.37.1.el9_4, perf 5.14.0-427.37.1.el9_4, rtla 5.14.0-427.37.1.el9_4, kernel-devel-matched 5.14.0-427.37.1.el9_4, kernel-64k-devel-matched 5.14.0-427.37.1.el9_4, kernel-debug-devel-matched 5.14.0-427.37.1.el9_4, +6 more
    fixed: vendor fix RHSA-2024:6997
  • Red Hat Enterprise Linux AppStream EUS (v.9.2) perf 5.14.0-284.77.1.el9_2, rtla 5.14.0-284.77.1.el9_2, kernel-devel-matched 5.14.0-284.77.1.el9_2, kernel-64k-devel-matched 5.14.0-284.77.1.el9_2, kernel-debug-devel-matched 5.14.0-284.77.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.77.1.el9_2, +5 more
    fixed: vendor fix RHSA-2024:5066
  • Red Hat Enterprise Linux BaseOS (v. 9) bpftool 7.3.0-427.37.1.el9_4, kernel 5.14.0-427.37.1.el9_4, kernel-64k 5.14.0-427.37.1.el9_4, kernel-core 5.14.0-427.37.1.el9_4, kernel-tools 5.14.0-427.37.1.el9_4, python3-perf 5.14.0-427.37.1.el9_4, +28 more
    fixed: vendor fix RHSA-2024:6997
  • Red Hat Enterprise Linux BaseOS EUS (v.9.2) bpftool 7.0.0-284.77.1.el9_2, kernel 5.14.0-284.77.1.el9_2, kernel-64k 5.14.0-284.77.1.el9_2, kernel-core 5.14.0-284.77.1.el9_2, kernel-tools 5.14.0-284.77.1.el9_2, python3-perf 5.14.0-284.77.1.el9_2, +28 more
    fixed: vendor fix RHSA-2024:5066
  • Red Hat Enterprise Linux CRB (v. 9) libperf 5.14.0-427.37.1.el9_4, kernel-debuginfo-common-s390x 5.14.0-427.37.1.el9_4, kernel-debuginfo-common-x86_64 5.14.0-427.37.1.el9_4, kernel-debuginfo-common-aarch64 5.14.0-427.37.1.el9_4, kernel-debuginfo-common-ppc64le 5.14.0-427.37.1.el9_4 Red Hat Enterprise Linux NFV (v. 9) kernel-rt 5.14.0-427.37.1.el9_4, kernel-rt-kvm 5.14.0-427.37.1.el9_4, kernel-rt-core 5.14.0-427.37.1.el9_4, kernel-rt-modules 5.14.0-427.37.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.37.1.el9_4, kernel-rt-debug-core 5.14.0-427.37.1.el9_4, +6 more
    fixed: vendor fix RHSA-2024:6997
show 3 more
  • Red Hat Enterprise Linux Real Time EUS (v.9.2) kernel-rt 5.14.0-284.77.1.rt14.362.el9_2, kernel-rt-core 5.14.0-284.77.1.rt14.362.el9_2, kernel-rt-modules 5.14.0-284.77.1.rt14.362.el9_2, kernel-rt-debug-core 5.14.0-284.77.1.rt14.362.el9_2, kernel-rt-modules-core 5.14.0-284.77.1.rt14.362.el9_2, kernel-rt-debug-modules 5.14.0-284.77.1.rt14.362.el9_2, +4 more Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2) kernel-rt 5.14.0-284.77.1.rt14.362.el9_2, kernel-rt-kvm 5.14.0-284.77.1.rt14.362.el9_2, kernel-rt-core 5.14.0-284.77.1.rt14.362.el9_2, kernel-rt-modules 5.14.0-284.77.1.rt14.362.el9_2, kernel-rt-debug-kvm 5.14.0-284.77.1.rt14.362.el9_2, kernel-rt-debug-core 5.14.0-284.77.1.rt14.362.el9_2, +6 more
    fixed: vendor fix RHSA-2024:5067
  • Red Hat Enterprise Linux RT (v. 9) kernel-rt 5.14.0-427.37.1.el9_4, kernel-rt-core 5.14.0-427.37.1.el9_4, kernel-rt-modules 5.14.0-427.37.1.el9_4, kernel-rt-debug-core 5.14.0-427.37.1.el9_4, kernel-rt-modules-core 5.14.0-427.37.1.el9_4, kernel-rt-debug-modules 5.14.0-427.37.1.el9_4, +4 more
    fixed: vendor fix RHSA-2024:6997
  • Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more Red Hat Enterprise Linux AppStream EUS (v.9.2) kernel-doc 5.14.0-284.77.1.el9_2
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.23% chance of exploitation in the next 30 days, higher than 13% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Linux Linux

Classification

Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.