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CVE-2024-26677

rxrpc: Fix delayed ACKs to not set the reference serial number

MEDIUM
5.5
CVSS Score
Published: April 2, 2024 at 07:01 AM UTC
Updated: October 30, 2026 at 01:17 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix delayed ACKs to not set the reference serial number Fix the construction of delayed ACKs to not set the reference serial number as they can't be used as an RTT reference.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
95%
2.6.22 ≤ v < 6.6.176.7 ≤ v < 6.7.517926a79320afa9b95df6b977b40cca6d8713cea6.86.8 rc16.8 rc26.8 rc3
Vendor states this is fixed in 200cb50b9e154434470c8969d32474d38475acc2 (fixed)
Vendor states this is fixed in 63719f490e6a89896e9a463d2b45e8203eab23ae (fixed)
Vendor states this is fixed in e7870cf13d20f56bfc19f9c3e89707c69cf104ef (fixed)
Vendor states this is fixed in 2.6.22 (unaffected)
Vendor states this is fixed in 6.1.191 (unaffected)
Vendor states this is fixed in 6.6.17 (unaffected)
Vendor states this is fixed in 6.7.5 (unaffected)
Vendor states this is fixed in 6.8 (unaffected)

References (4)

Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/200cb50b9e154434470c8969d32474d38475acc2
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/63719f490e6a89896e9a463d2b45e8203eab23ae
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/e7870cf13d20f56bfc19f9c3e89707c69cf104ef
Source: cverecord
https://git.kernel.org/stable/c/7a72f92f42b728f0d45efa081e78d1ebaf7ac725

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.5MEDIUM[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-476

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