5.5

CVE-2024-26618: arm64/sme: Always exit sme_alloc() early with existing storage

Modified
AliasesUBUNTU-CVE-2024-26618DEBIAN-CVE-2024-26618
Published 29-02-2024Last modified 23-05-2026

Vulnerability summary

CVE-2024-26618 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 15% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.24%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 9 · Related 9
DLA-4271-1DSA-5925-1RHSA-2024:9315USN-6818-1USN-6818-3USN-6818-4

Timeline

  1. 29-02-2024
    PublishedVulnerability first disclosed.
  2. 23-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: arm64/sme: Always exit sme_alloc() early with existing storage When sme_alloc() is called with existing storage and we are not flushing we will always allocate new storage, both leaking the existing storage and corrupting the state. Fix this by separating the checks for flushing and for existing storage as we do for SVE. Callers that reallocate (eg, due to changing the vector length) should call sme_free() themselves.

CVSS metrics

3 scores · 3 sources · 1 version

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

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

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≥ 21614ba60883eb93b99a7ee4b41cb927f93b39ae, < f6421555dbd7cb3d4d70b69f33f998aaeca1e3b5 | ≥ 5d0a8d2fba50e9c07cde4aad7fba28c008b07a5b, < 569156e4fa347237f8fa2a7e935d860109c55ac4 | ≥ 5d0a8d2fba50e9c07cde4aad7fba28c008b07a5b, < 814af6b4e6000e574e74d92197190edf07cc3680 | ≥ 5d0a8d2fba50e9c07cde4aad7fba28c008b07a5b, < dc7eb8755797ed41a0d1b5c0c39df3c8f401b3d9 | e01af8e26c23a08625a3dd6c8c472a1752d76cce | ≥ 6.1.47, < 6.1.140 | ≥ 6.4.12, < 6.5 | 6.5
  • linux_kernel≥ 6.5, < 6.6.15 | ≥ 6.7, < 6.7.3
Debian1 product
  • linux< 6.1.140-1 | < 6.6.15-1

3 vendors · 78 products

References

17 links
Show all 17 references