CVE-2021-46966: vulnerability in Linux
ACPI: custom_method: fix potential use-after-free issue
Published · Updated
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.2%
exploitation probability
0.2%top 87% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved:
ACPI: custom_method: fix potential use-after-free issue
In cm_write(), buf is always freed when reaching the end of the
function. If the requested count is less than table.length, the
allocated buffer will be freed but subsequent calls to cm_write() will
still try to access it.
Remove the unconditional kfree(buf) at the end of the function and
set the buf to NULL in the -EINVAL error path to match the rest of
function.
Affected products
Linux · LinuxRelated CVEs — Linux
In the same product, most dangerous first.
CVE-2024-53197HIGHALSA: usb-audio: Fix potential out-of-bound accesses for Extigy and Mbox devicesEPSS 4.1%KEVCVE-2026-31431HIGHcrypto: algif_aead - Revert to operating out-of-placeEPSS 3.4%KEVCVE-2024-53104HIGHmedia: uvcvideo: Skip parsing frames of type UVC_VS_UNDEFINED in uvc_parse_formatEPSS 3.4%KEVCVE-2025-39682CRITICALtls: fix handling of zero-length records on the rx_listEPSS 2.9%KEVCVE-2024-36971HIGHnet: fix __dst_negative_advice() raceEPSS 2.7%KEVCVE-2024-53150HIGHALSA: usb-audio: Fix out of bounds reads when finding clock sourcesEPSS 1.4%KEV
References
https://git.kernel.org/stable/c/1d53ca5d131074c925ce38361fb0376d3bf7e394https://git.kernel.org/stable/c/62dc2440ebb552aa0d7f635e1697e077d9d21203https://git.kernel.org/stable/c/72814a94c38a33239793f7622cec6ace1e540c4bhttps://git.kernel.org/stable/c/8b04d57f30caf76649d0567551589af9a66ca9behttps://git.kernel.org/stable/c/90575d1d9311b753cf1718f4ce9061ddda7dfd23https://git.kernel.org/stable/c/a5b26a2e362f572d87e9fd35435680e557052a17https://git.kernel.org/stable/c/b7a5baaae212a686ceb812c32fceed79c03c0234https://git.kernel.org/stable/c/e483bb9a991bdae29a0caa4b3a6d002c968f94aahttps://git.kernel.org/stable/c/f16737caf41fc06cfe6e49048becb09657074d4b