CVE-2024-26800
tls: fix use-after-free on failed backlog decryption
Description
In the Linux kernel, the following vulnerability has been resolved: tls: fix use-after-free on failed backlog decryption When the decrypt request goes to the backlog and crypto_aead_decrypt returns -EBUSY, tls_do_decryption will wait until all async decryptions have completed. If one of them fails, tls_do_decryption will return -EBADMSG and tls_decrypt_sg jumps to the error path, releasing all the pages. But the pages have been passed to the async callback, and have already been released by tls_decrypt_done. The only true async case is when crypto_aead_decrypt returns -EINPROGRESS. With -EBUSY, we already waited so we can tell tls_sw_recvmsg that the data is available for immediate copy, but we need to notify tls_decrypt_sg (via the new ->async_done flag) that the memory has already been released.
INFO
Published Date :
April 4, 2024, 9:15 a.m.
Last Modified :
Dec. 11, 2025, 3:38 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 | HIGH | [email protected] |
Solution
- Update the Linux kernel to address the vulnerability.
- Reboot the system after the 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-2024-26800.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2024-26800 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-2024-26800
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-2024-26800 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2024-26800 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.
-
Modified Analysis by [email protected]
Dec. 11, 2025
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.8:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.8:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.8:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.8:rc6:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.8:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7.6 up to (excluding) 6.7.9 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.6.18 up to (excluding) 6.6.21 OR *cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.8:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.8:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.8:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.8:rc6:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.8:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7.6 up to (excluding) 6.7.9 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.6.18 up to (excluding) 6.6.21 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.15.160 up to (excluding) 5.16 -
Initial Analysis by [email protected]
Dec. 20, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE NIST CWE-416 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.6.18 up to (excluding) 6.6.21 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7.6 up to (excluding) 6.7.9 *cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.8:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.8:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.8:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.8:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.8:rc6:*:*:*:*:*:* Changed Reference Type https://git.kernel.org/stable/c/13114dc5543069f7b97991e3b79937b6da05f5b0 No Types Assigned https://git.kernel.org/stable/c/13114dc5543069f7b97991e3b79937b6da05f5b0 Patch Changed Reference Type https://git.kernel.org/stable/c/13114dc5543069f7b97991e3b79937b6da05f5b0 No Types Assigned https://git.kernel.org/stable/c/13114dc5543069f7b97991e3b79937b6da05f5b0 Patch Changed Reference Type https://git.kernel.org/stable/c/1ac9fb84bc7ecd4bc6428118301d9d864d2a58d1 No Types Assigned https://git.kernel.org/stable/c/1ac9fb84bc7ecd4bc6428118301d9d864d2a58d1 Patch Changed Reference Type https://git.kernel.org/stable/c/1ac9fb84bc7ecd4bc6428118301d9d864d2a58d1 No Types Assigned https://git.kernel.org/stable/c/1ac9fb84bc7ecd4bc6428118301d9d864d2a58d1 Patch Changed Reference Type https://git.kernel.org/stable/c/81be85353b0f5a7b660635634b655329b429eefe No Types Assigned https://git.kernel.org/stable/c/81be85353b0f5a7b660635634b655329b429eefe Patch Changed Reference Type https://git.kernel.org/stable/c/81be85353b0f5a7b660635634b655329b429eefe No Types Assigned https://git.kernel.org/stable/c/81be85353b0f5a7b660635634b655329b429eefe Patch Changed Reference Type https://git.kernel.org/stable/c/f2b85a4cc763841843de693bbd7308fe9a2c4c89 No Types Assigned https://git.kernel.org/stable/c/f2b85a4cc763841843de693bbd7308fe9a2c4c89 Patch Changed Reference Type https://git.kernel.org/stable/c/f2b85a4cc763841843de693bbd7308fe9a2c4c89 No Types Assigned https://git.kernel.org/stable/c/f2b85a4cc763841843de693bbd7308fe9a2c4c89 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/13114dc5543069f7b97991e3b79937b6da05f5b0 Added Reference https://git.kernel.org/stable/c/1ac9fb84bc7ecd4bc6428118301d9d864d2a58d1 Added Reference https://git.kernel.org/stable/c/81be85353b0f5a7b660635634b655329b429eefe Added Reference https://git.kernel.org/stable/c/f2b85a4cc763841843de693bbd7308fe9a2c4c89 -
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 Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Apr. 04, 2024
Action Type Old Value New Value Added Reference kernel.org https://git.kernel.org/stable/c/f2b85a4cc763841843de693bbd7308fe9a2c4c89 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/13114dc5543069f7b97991e3b79937b6da05f5b0 [No types assigned] -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Apr. 04, 2024
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: tls: fix use-after-free on failed backlog decryption When the decrypt request goes to the backlog and crypto_aead_decrypt returns -EBUSY, tls_do_decryption will wait until all async decryptions have completed. If one of them fails, tls_do_decryption will return -EBADMSG and tls_decrypt_sg jumps to the error path, releasing all the pages. But the pages have been passed to the async callback, and have already been released by tls_decrypt_done. The only true async case is when crypto_aead_decrypt returns -EINPROGRESS. With -EBUSY, we already waited so we can tell tls_sw_recvmsg that the data is available for immediate copy, but we need to notify tls_decrypt_sg (via the new ->async_done flag) that the memory has already been released. Added Reference kernel.org https://git.kernel.org/stable/c/81be85353b0f5a7b660635634b655329b429eefe [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/1ac9fb84bc7ecd4bc6428118301d9d864d2a58d1 [No types assigned]