7.5

CVE-2026-46024: linux NULL Pointer Dereference

CVSS: 7.5v3.1HighModified
AliasesUBUNTU-CVE-2026-46024DEBIAN-CVE-2026-46024
Published 27-05-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-46024 is a high (CVSS 7.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.70% chance of exploitation in the next 30 days, higher than 52.5% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.70%
0%100%
Low · +0.21 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 46 · Related 46
OPENSUSE-SU-2026:10954-1OPENSUSE-SU-2026:21388-1SUSE-SU-2026:22108-1SUSE-SU-2026:22137-1SUSE-SU-2026:22433-1SUSE-SU-2026:22458-1

Timeline

  1. 27-05-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: libceph: Prevent potential null-ptr-deref in ceph_handle_auth_reply() If a message of type CEPH_MSG_AUTH_REPLY contains a zero value for both protocol and result, this is currently not treated as an error. In case of ac->negotiating == true and ac->protocol > 0, this leads to setting ac->protocol = 0 and ac->ops = NULL. Thereafter, the check for ac->protocol != protocol returns false, and init_protocol() is not called. Subsequently, ac->ops->handle_reply() is called, which leads to a null pointer dereference, because ac->ops is still NULL. This patch changes the check for ac->protocol != protocol to !ac->protocol, as this also includes the case when the protocol was set to zero in the message. This causes the message to be treated as containing a bad auth protocol.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.70%

Chance of exploitation in the next 30 days

Percentile

53%

Versus all other CVEs

30-day change

+0.21 pp

From 0.49% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.70%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu159 products
  • linuxAll versions (No fix recorded) | < 5.15.0-186.196 | < 6.8.0-136.136 | < 7.0.0-27.27
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1112.119 | < 6.8.0-1061.64 | < 7.0.0-1008.8
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc, < 9ded62c302c0342efdb5eda3bf6e75720caad0df | ≥ 4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc, < f101271fcf55d7eacfefd610b51ec65f46ba8118 | ≥ 4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc, < 4b2738b93edad661178340239de657d876b73d3d | ≥ 4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc, < 927e4bd5692f2a4901808822981fb2c8d4456548 | ≥ 4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc, < 016bc663657366d386993f63eb31072eb45a2b77 | ≥ 4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc, < 8f2be7285941a33a9f72579a23b96392f83c758e | ≥ 4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc, < 5199c125d25aeae8615c4fc31652cc0fe624338e | 2.6.34
  • linux_kernel≥ 2.6.34.1, < 5.15.209 | ≥ 5.16, < 6.1.175 | ≥ 6.2, < 6.6.140 | ≥ 6.7, < 6.12.86 | ≥ 6.13, < 6.18.27 | ≥ 6.19, < 7.0.4 | 2.6.34 | 2.6.34:rc2 | 2.6.34:rc3 | 2.6.34:rc4 | 2.6.34:rc5 | 2.6.34:rc6 | 2.6.34:rc7
Debian1 product
  • linux< 6.1.176-1 | < 6.12.86-1 | < 7.0.4-1

3 vendors · 162 products

References

45 links
Show all 45 references