5.5

CVE-2024-26752: debian debian_linux Incorrect Calculation of Buffer Size

CVSS: 5.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2024-26752DEBIAN-CVE-2024-26752
Published 03-04-2024Last modified 23-05-2026
Open JSON

Vulnerability summary

CVE-2024-26752 is a medium (CVSS 5.5) Incorrect Calculation of Buffer Size vulnerability in debian debian_linux. EPSS estimates a 0.25% chance of exploitation in the next 30 days, higher than 15.5% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.25%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 18 · Related 15
DLA-3840-1DLA-3842-1DSA-5681-1SUSE-SU-2024:1979-1SUSE-SU-2024:1983-1SUSE-SU-2024:2184-1

Timeline

  1. 03-04-2024
    PublishedVulnerability first disclosed.
  2. 23-05-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.25%

Chance of exploitation in the next 30 days

Percentile

16%

Versus all other CVEs

30-day change

0.00 pp

From 0.25% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.25%

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

Ubuntu116 products
  • linuxAll versions (No fix recorded) | < 5.4.0-186.206 | < 5.15.0-112.122
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.4.0-1126.136 | < 5.15.0-1063.69
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
Linux2 products
  • linux≥ 559d697c5d072593d22b3e0bd8b8081108aeaf59, < 4c3ce64bc9d36ca9164dd6c77ff144c121011aae | ≥ 1fc793d68d50dee4782ef2e808913d5dd880bcc6, < c1d3a84a67db910ce28a871273c992c3d7f9efb5 | ≥ 96b2e1090397217839fcd6c9b6d8f5d439e705ed, < dcb4d14268595065c85dc5528056713928e17243 | ≥ cd1189956393bf850b2e275e37411855d3bd86bb, < 0da15a70395182ee8cb75716baf00dddc0bea38d | ≥ f6a7182179c0ed788e3755ee2ed18c888ddcc33f, < 13cd1daeea848614e585b2c6ecc11ca9c8ab2500 | ≥ 9d4c75800f61e5d75c1659ba201b6c0c7ead3070, < 804bd8650a3a2bf3432375f8c97d5049d845ce56 | ≥ 9d4c75800f61e5d75c1659ba201b6c0c7ead3070, < 83340c66b498e49353530e41542500fc8a4782d6 | ≥ 9d4c75800f61e5d75c1659ba201b6c0c7ead3070, < 359e54a93ab43d32ee1bff3c2f9f10cb9f6b6e79 | 7626b9fed53092aa2147978070e610ecb61af844 | fe80658c08e3001c80c5533cd41abfbb0e0e28fd | ≥ 4.19.296, < 4.19.308 | ≥ 5.4.258, < 5.4.270 | ≥ 5.10.198, < 5.10.211 | ≥ 5.15.135, < 5.15.150 | ≥ 6.1.57, < 6.1.80 | ≥ 4.14.327, < 4.15 | ≥ 6.5.7, < 6.6 | 6.6
  • linux_kernelEOL≥ 4.19.296, < 4.19.308 | ≥ 5.4.258, < 5.4.270 | ≥ 5.10.198, < 5.10.211 | ≥ 5.15.135, < 5.15.150 | ≥ 6.1.57, < 6.1.80 | ≥ 6.6, < 6.6.19 | ≥ 6.7, < 6.7.7 | 4.14.327 | 6.5.7 | 6.8:rc1 | 6.8:rc2 | 6.8:rc3 | 6.8:rc4 | 6.8:rc5

3 vendors · 120 products

References

26 links
Show all 26 references