CVE - CVE-2024-26840

CVE-ID
CVE-2024-26840	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: cachefiles: fix memory leak in cachefiles_add_cache() The following memory leak was reported after unbinding /dev/cachefiles: ================================================================== unreferenced object 0xffff9b674176e3c0 (size 192): comm "cachefilesd2", pid 680, jiffies 4294881224 hex dump (first 32 bytes): 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace (crc ea38a44b): [<ffffffff8eb8a1a5>] kmem_cache_alloc+0x2d5/0x370 [<ffffffff8e917f86>] prepare_creds+0x26/0x2e0 [<ffffffffc002eeef>] cachefiles_determine_cache_security+0x1f/0x120 [<ffffffffc00243ec>] cachefiles_add_cache+0x13c/0x3a0 [<ffffffffc0025216>] cachefiles_daemon_write+0x146/0x1c0 [<ffffffff8ebc4a3b>] vfs_write+0xcb/0x520 [<ffffffff8ebc5069>] ksys_write+0x69/0xf0 [<ffffffff8f6d4662>] do_syscall_64+0x72/0x140 [<ffffffff8f8000aa>] entry_SYSCALL_64_after_hwframe+0x6e/0x76 ================================================================== Put the reference count of cache_cred in cachefiles_daemon_unbind() to fix the problem. And also put cache_cred in cachefiles_add_cache() error branch to avoid memory leaks.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/037d5a949b0455540ef9aab34c10ddf54b65d285 URL:https://git.kernel.org/stable/c/037d5a949b0455540ef9aab34c10ddf54b65d285 MISC:https://git.kernel.org/stable/c/38e921616320d159336b0ffadb09e9fb4945c7c3 URL:https://git.kernel.org/stable/c/38e921616320d159336b0ffadb09e9fb4945c7c3 MISC:https://git.kernel.org/stable/c/43eccc5823732ba6daab2511ed32dfc545a666d8 URL:https://git.kernel.org/stable/c/43eccc5823732ba6daab2511ed32dfc545a666d8 MISC:https://git.kernel.org/stable/c/8b218e2f0a27a9f09428b1847b4580640b9d1e58 URL:https://git.kernel.org/stable/c/8b218e2f0a27a9f09428b1847b4580640b9d1e58 MISC:https://git.kernel.org/stable/c/94965be37add0983672e48ecb33cdbda92b62579 URL:https://git.kernel.org/stable/c/94965be37add0983672e48ecb33cdbda92b62579 MISC:https://git.kernel.org/stable/c/9cac69912052a4def571fedf1cb9bb4ec590e25a URL:https://git.kernel.org/stable/c/9cac69912052a4def571fedf1cb9bb4ec590e25a MISC:https://git.kernel.org/stable/c/cb5466783793e66272624cf71925ae1d1ba32083 URL:https://git.kernel.org/stable/c/cb5466783793e66272624cf71925ae1d1ba32083 MISC:https://git.kernel.org/stable/c/e21a2f17566cbd64926fb8f16323972f7a064444 URL:https://git.kernel.org/stable/c/e21a2f17566cbd64926fb8f16323972f7a064444
Assigning CNA
kernel.org
Date Record Created
20240219	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240219)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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