CVE-2024-26826
"Linux MPTCP Data Re-injection Stale Subflow Information Disclosure"
Description
In the Linux kernel, the following vulnerability has been resolved: mptcp: fix data re-injection from stale subflow When the MPTCP PM detects that a subflow is stale, all the packet scheduler must re-inject all the mptcp-level unacked data. To avoid acquiring unneeded locks, it first try to check if any unacked data is present at all in the RTX queue, but such check is currently broken, as it uses TCP-specific helper on an MPTCP socket. Funnily enough fuzzers and static checkers are happy, as the accessed memory still belongs to the mptcp_sock struct, and even from a functional perspective the recovery completed successfully, as the short-cut test always failed. A recent unrelated TCP change - commit d5fed5addb2b ("tcp: reorganize tcp_sock fast path variables") - exposed the issue, as the tcp field reorganization makes the mptcp code always skip the re-inection. Fix the issue dropping the bogus call: we are on a slow path, the early optimization proved once again to be evil.
INFO
Published Date :
April 17, 2024, 10:15 a.m.
Last Modified :
March 27, 2025, 8:57 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update the Linux kernel to address the vulnerability.
- Reboot the system after the kernel update.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2024-26826.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2024-26826 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2024-26826
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2024-26826 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2024-26826 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Mar. 27, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.7.6 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.18 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.79 *cpe:2.3:o:linux:linux_kernel:6.8:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.15 up to (excluding) 5.15.149 Added Reference Type CVE: https://git.kernel.org/stable/c/624902eab7abcb8731b333ec73f206d38d839cd8 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/624902eab7abcb8731b333ec73f206d38d839cd8 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/6673d9f1c2cd984390550dbdf7d5ae07b20abbf8 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/6673d9f1c2cd984390550dbdf7d5ae07b20abbf8 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/6f95120f898b40d13fd441225ef511307853c9c2 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/6f95120f898b40d13fd441225ef511307853c9c2 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/b609c783c535493aa3fca22c7e40a120370b1ca5 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/b609c783c535493aa3fca22c7e40a120370b1ca5 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/b6c620dc43ccb4e802894e54b651cf81495e9598 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/b6c620dc43ccb4e802894e54b651cf81495e9598 Types: Patch -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/624902eab7abcb8731b333ec73f206d38d839cd8 Added Reference https://git.kernel.org/stable/c/6673d9f1c2cd984390550dbdf7d5ae07b20abbf8 Added Reference https://git.kernel.org/stable/c/6f95120f898b40d13fd441225ef511307853c9c2 Added Reference https://git.kernel.org/stable/c/b609c783c535493aa3fca22c7e40a120370b1ca5 Added Reference https://git.kernel.org/stable/c/b6c620dc43ccb4e802894e54b651cf81495e9598 -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 29, 2024
Action Type Old Value New Value -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 14, 2024
Action Type Old Value New Value -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Apr. 17, 2024
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: mptcp: fix data re-injection from stale subflow When the MPTCP PM detects that a subflow is stale, all the packet scheduler must re-inject all the mptcp-level unacked data. To avoid acquiring unneeded locks, it first try to check if any unacked data is present at all in the RTX queue, but such check is currently broken, as it uses TCP-specific helper on an MPTCP socket. Funnily enough fuzzers and static checkers are happy, as the accessed memory still belongs to the mptcp_sock struct, and even from a functional perspective the recovery completed successfully, as the short-cut test always failed. A recent unrelated TCP change - commit d5fed5addb2b ("tcp: reorganize tcp_sock fast path variables") - exposed the issue, as the tcp field reorganization makes the mptcp code always skip the re-inection. Fix the issue dropping the bogus call: we are on a slow path, the early optimization proved once again to be evil. Added Reference kernel.org https://git.kernel.org/stable/c/6f95120f898b40d13fd441225ef511307853c9c2 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/6673d9f1c2cd984390550dbdf7d5ae07b20abbf8 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/b609c783c535493aa3fca22c7e40a120370b1ca5 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/624902eab7abcb8731b333ec73f206d38d839cd8 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/b6c620dc43ccb4e802894e54b651cf81495e9598 [No types assigned]