CVE-2024-26789: crypto: arm64/neonbs - fix out-of-bounds access on short input
Vulnerability summary
CVE-2024-26789 is a high (CVSS 7.8) Out-of-bounds Read vulnerability in linux. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 14.6% of scored vulnerabilities.
Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 5 · Related 5Timeline
- 04-04-2024PublishedVulnerability first disclosed.
- 05-08-2026Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
4 scores · 4 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- NVDNIST7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.24%
Chance of exploitation in the next 30 days
Percentile
15%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.24% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu75 products
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
- linux-aws-5.13All versions (No fix recorded)
- linux-aws-5.19All versions (No fix recorded)
Linux2 products
- linux≥ fc074e130051015e39245a4241956ff122e2f465, < 034e2d70b5c7f578200ad09955aeb2aa65d1164a | ≥ fc074e130051015e39245a4241956ff122e2f465, < 1291d278b5574819a7266568ce4c28bce9438705 | ≥ fc074e130051015e39245a4241956ff122e2f465, < 9e8ecd4908b53941ab6f0f51584ab80c6c6606c4 | ≥ fc074e130051015e39245a4241956ff122e2f465, < 1c0cf6d19690141002889d72622b90fc01562ce4 | 5.18
- linux_kernel≥ 5.18, ≤ 6.1.81 | ≥ 6.2, ≤ 6.6.21 | ≥ 6.2, ≤ 6.7.9 | 6.8:rc1 | 6.8:rc2 | 6.8:rc3 | 6.8:rc4 | 6.8:rc5 | 6.8:rc6
Debian1 product
- linux< 6.1.82-1 | < 6.7.9-1
3 vendors · 78 products
