CVE-2024-26832
Linux Kernel zswap Lock Leaked Folio
Description
In the Linux kernel, the following vulnerability has been resolved: mm: zswap: fix missing folio cleanup in writeback race path In zswap_writeback_entry(), after we get a folio from __read_swap_cache_async(), we grab the tree lock again to check that the swap entry was not invalidated and recycled. If it was, we delete the folio we just added to the swap cache and exit. However, __read_swap_cache_async() returns the folio locked when it is newly allocated, which is always true for this path, and the folio is ref'd. Make sure to unlock and put the folio before returning. This was discovered by code inspection, probably because this path handles a race condition that should not happen often, and the bug would not crash the system, it will only strand the folio indefinitely.
INFO
Published Date :
April 17, 2024, 10:15 a.m.
Last Modified :
April 2, 2025, 1:18 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 a non-vulnerable version.
- Reboot the system to apply 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-2024-26832.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2024-26832 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-2024-26832
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-2024-26832 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2024-26832 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]
Apr. 02, 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 CWE-459 Added 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:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.7.7 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.1.30 up to (excluding) 6.1.80 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.4 up to (excluding) 6.6.19 *cpe:2.3:o:linux:linux_kernel:6.3.4:*:*:*:*:*:*:* Added Reference Type CVE: https://git.kernel.org/stable/c/14f1992430ef9e647b02aa8ca12c5bcb9a1dffea Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/14f1992430ef9e647b02aa8ca12c5bcb9a1dffea Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/6156277d1b26cb3fdb6fcbf0686ab78268571644 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/6156277d1b26cb3fdb6fcbf0686ab78268571644 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/e2891c763aa2cff74dd6b5e978411ccf0cf94abe Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/e2891c763aa2cff74dd6b5e978411ccf0cf94abe Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/e3b63e966cac0bf78aaa1efede1827a252815a1d Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/e3b63e966cac0bf78aaa1efede1827a252815a1d 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/14f1992430ef9e647b02aa8ca12c5bcb9a1dffea Added Reference https://git.kernel.org/stable/c/6156277d1b26cb3fdb6fcbf0686ab78268571644 Added Reference https://git.kernel.org/stable/c/e2891c763aa2cff74dd6b5e978411ccf0cf94abe Added Reference https://git.kernel.org/stable/c/e3b63e966cac0bf78aaa1efede1827a252815a1d -
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: mm: zswap: fix missing folio cleanup in writeback race path In zswap_writeback_entry(), after we get a folio from __read_swap_cache_async(), we grab the tree lock again to check that the swap entry was not invalidated and recycled. If it was, we delete the folio we just added to the swap cache and exit. However, __read_swap_cache_async() returns the folio locked when it is newly allocated, which is always true for this path, and the folio is ref'd. Make sure to unlock and put the folio before returning. This was discovered by code inspection, probably because this path handles a race condition that should not happen often, and the bug would not crash the system, it will only strand the folio indefinitely. Added Reference kernel.org https://git.kernel.org/stable/c/14f1992430ef9e647b02aa8ca12c5bcb9a1dffea [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/6156277d1b26cb3fdb6fcbf0686ab78268571644 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/e2891c763aa2cff74dd6b5e978411ccf0cf94abe [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/e3b63e966cac0bf78aaa1efede1827a252815a1d [No types assigned]