CVE-2024-26752

Medium

In the Linux kernel, the following vulnerability has been resolved: l2tp: pass correct message length to ip6_append_data l2tp_ip6_sendmsg needs to avoid accounting for the transport header twice when splicing more data into an already partially-occupied skbuff. To manage this, we check whether the skbuff contains data using skb_queue_empty when deciding how much data to append using ip6_append_data. However, the code which performed the calculation was incorrect: ulen = len + skb_queue_empty(&sk->sk_write_queue) ? transhdrlen : 0; ...due to C operator precedence, this ends up setting ulen to transhdrlen for messages with a non-zero length, which results in corrupted packets on the wire. Add parentheses to correct the calculation in line with the original intent.

Package Linux Kernel
Published 2024-04-03
Last modified 2025-03-17
CVSS version 3.1
Patch available
Yes

CVSS 3.1 score

5.5

out of 10
Medium
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness type

CWE-131

CVE-2024-26752 is classified as CWE-131

See CWE-131 on MITRE CWE for full details on this weakness type.

Affected versions

Linux kernel versions 4.19.296, 5.4.258, 5.10.198, 5.15.135, 6.1.57, 4.14.327, 6.5.7, 6.6 and later are affected. Fixed in 4.19.308, 5.4.270, 5.10.211, 5.15.150, 6.1.80, 6.6.19, 6.7.7, 6.8 and their respective stable series.

Affected from
≥ 4.19.296 ≥ 5.4.258 ≥ 5.10.198 ≥ 5.15.135 ≥ 6.1.57 ≥ 4.14.327 ≥ 6.5.7 ≥ 6.6
Fixed in
✓ 4.19.308 4.19.x ✓ 5.4.270 5.4.x ✓ 5.10.211 5.10.x ✓ 5.15.150 5.15.x ✓ 6.1.80 6.1.x ✓ 6.6.19 6.6.x ✓ 6.7.7 6.7.x ✓ 6.8

References

10 total
Showing 5 of 10 references View all on NVD

Frequently asked questions

  • What is CVE-2024-26752?

    CVE-2024-26752 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 4.19.296 onward and has been patched in 4.19.308, 5.4.270, 5.10.211 and others. CVE-2024-26752 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2024-26752?

    CVE-2024-26752 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H .

  • Is there a patch available for CVE-2024-26752?

    Yes. CVE-2024-26752 has been patched. Fixed versions include 4.19.308, 5.4.270, 5.10.211 and others. If you are running Linux kernel 4.19.296 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2024-26752 actively exploited?

    No. CVE-2024-26752 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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