CVE-2024-26789 json
crypto: arm64/neonbs - fix out-of-bounds access on short input
published 2y ago modified 3mo ago also EUVD-2024-24051
- cvss
- 7.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 14%
- public exploits
- 0
- none known
Summary
In the Linux kernel, the following vulnerability has been resolved:
crypto: arm64/neonbs - fix out-of-bounds access on short input
The bit-sliced implementation of AES-CTR operates on blocks of 128 bytes, and will fall back to the plain NEON version for tail blocks or inputs that are shorter than 128 bytes to begin with.
It will call straight into the plain NEON asm helper, which performs all memory accesses in granules of 16 bytes (the size of a NEON register). For this reason, the associated plain NEON glue code will copy inputs shorter than 16 bytes into a temporary buffer, given that this is a rare occurrence and it is not worth the effort to work around this in the asm code.
The fallback from the bit-sliced NEON version fails to take this into account, potentially resulting in out-of-bounds accesses. So clone the same workaround, and use a temp buffer for short in/outputs.
Patch / fix
- Linux Linux 6.1.81, 6.6.21, 6.7.9, 6.8
- linux Debian 12 6.1.82-1
- linux Debian 14, Debian 13 6.7.9-1
debian advisories DEBIAN-CVE-2024-26789
- linux-aws-6.5 Ubuntu 22.04 LTS 6.5.0-1023.23~22.04.1
- linux-gcp-6.5 Ubuntu 22.04 LTS 6.5.0-1024.26~22.04.1
- linux-hwe-6.5 Ubuntu 22.04 LTS 6.5.0-44.44~22.04.1
- linux-oem-6.5 Ubuntu 22.04 LTS 6.5.0-1027.28
- linux-azure-6.5 Ubuntu 22.04 LTS 6.5.0-1024.25~22.04.1
- linux-nvidia-6.5 Ubuntu 22.04 LTS 6.5.0-1023.24
- linux-oracle-6.5 Ubuntu 22.04 LTS 6.5.0-1026.26~22.04.1
- linux-starfive-6.5 Ubuntu 22.04 LTS 6.5.0-1017.18~22.04.1
ubuntu advisories UBUNTU-CVE-2024-26789
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
Is CVE-2024-26789 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerVendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2024-26789 updated cvss 5.5
kernel: crypto: arm64/neonbs - fix out-of-bounds access on short input
-
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 Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +83 morenot 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
- 2y ago
Exploit prediction
0.24% chance of exploitation in the next 30 days, higher than 14% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| CISA ADP | 3.1 | 7.1 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H |
| CNA | 3.1 | 7.1 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H |
Affected products
- Linux Linux
Classification
- Weakness
-
- CWE-125 Out-of-bounds Read
- Technology feeds
References
Sources
- CVE List CVE-2024-26789
- NVD CVE-2024-26789
Fencer Intel 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.