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TI-2024-17628 Aliases CVE-2024-26752GHSA-xhj3-2vvm-6mr5

l2tp: pass correct message length to ip6_append_data

Priority LOW 24CWE-131Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-131 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00252 16th percentileScored 2026-11-07
Fix Fixed Linux (Linux): 4.19.308, 5.4.270, 5.10.211 +7

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux4.19.296 to before 4.19.308; 5.4.258 to before 5.4.270; 5.10.198 to before 5.10.211; 5.15.135 to before 5.15.150; 6.1.57 to before 6.1.80; 4.14.327 to before 4.15; 6.5.7 to before 6.64.19.308, 5.4.270, 5.10.211, 5.15.150, 6.1.80, 4.15, 6.6Patch availableCNA
LinuxLinux6.6 and later4.19.308, 5.4.270, 5.10.211, 5.15.150, 6.1.80, 6.6.19, 6.7.7, 6.8Patch availableCNA
  • Linux VendorLinux Affected 4.19.296 to before 4.19.308; 5.4.258 to before 5.4.270; 5.10.198 to before 5.10.211; 5.15.135 to before 5.15.150; 6.1.57 to before 6.1.80; 4.14.327 to before 4.15; 6.5.7 to before 6.6 Fixed in 4.19.308, 5.4.270, 5.10.211, 5.15.150, 6.1.80, 4.15, 6.6 Patch available CNA
  • Linux VendorLinux Affected 6.6 and later 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 Patch available CNA

CPE configurations NVD · 9

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*4.19.296 to before 4.19.308; 5.4.258 to before 5.4.270; 5.10.198 to before 5.10.211; 5.15.135 to before 5.15.150; 6.1.57 to before 6.1.80; 6.6 to before 6.6.19; 6.7 to before 6.7.7VulnerableLinux
cpe:2.3:o:linux:linux_kernel:4.14.327:*:*:*:*:*:*:*4.14.327VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.5.7:*:*:*:*:*:*:*6.5.7VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:*6.8 rc1VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.8:rc2:*:*:*:*:*:*6.8 rc2VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.8:rc3:*:*:*:*:*:*6.8 rc3VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.8:rc4:*:*:*:*:*:*6.8 rc4VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.8:rc5:*:*:*:*:*:*6.8 rc5VulnerableLinux
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*10.0VulnerableDebian
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 4.19.296 to before 4.19.308; 5.4.258 to before 5.4.270; 5.10.198 to before 5.10.211; 5.15.135 to before 5.15.150; 6.1.57 to before 6.1.80; 6.6 to before 6.6.19; 6.7 to before 6.7.7 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:4.14.327:*:*:*:*:*:*:* Versions 4.14.327 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.5.7:*:*:*:*:*:*:* Versions 6.5.7 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:* Versions 6.8 rc1 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.8:rc2:*:*:*:*:*:* Versions 6.8 rc2 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.8:rc3:*:*:*:*:*:* Versions 6.8 rc3 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.8:rc4:*:*:*:*:*:* Versions 6.8 rc4 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.8:rc5:*:*:*:*:*:* Versions 6.8 rc5 Vulnerable ·Linux
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian

Remediation

  • Fix · CNA Linux (Linux) Fixed in 4.19.308, 5.4.270, 5.10.211, 5.15.150, 6.1.80, 4.15, 6.6
  • Fix · CNA Linux (Linux) 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

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Not affected: 4 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-26752
  2. 2026-10-03 Alias added: GHSA-xhj3-2vvm-6mr5

References

Patch 8

  • TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
  • TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
  • TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
  • TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
  • TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
See all 15278 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences