CVE-2025-38556
In the Linux kernel, the following vulnerability has been resolved: HID: core: Harden s32ton() against conversion to 0 bits Testing by the syzbot fuzzer showed that the HID core gets a shift-out-of-bounds exception when it tries to convert a 32-bit…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.17%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In the Linux kernel, the following vulnerability has been resolved: HID: core: Harden s32ton() against conversion to 0 bits Testing by the syzbot fuzzer showed that the HID core gets a shift-out-of-bounds exception when it tries to convert a 32-bit quantity to a 0-bit quantity. Ideally this should never occur, but there are buggy devices and some might have a report field with size set to zero; we shouldn't reject the report or the device just because of that. Instead, harden the s32ton() routine so that it returns a reasonable result instead of crashing when it is called with the number of bits set to 0 -- the same as what snto32() does.
- CVSS 3.1
- 7.1 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- EPSS
- 0.17% probability · 6th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-125
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/3c86548a20d7bc2861aa4de044991a327bebad1a
- https://git.kernel.org/stable/c/6cdf6c708717c5c6897d0800a1793e83757c7491
- https://git.kernel.org/stable/c/810189546cb6c8f36443ed091d91f1f5d2fc2ec7
- https://git.kernel.org/stable/c/865ad8469fa24de1559f247d9426ab01e5ce3a56Patch
- https://git.kernel.org/stable/c/8b4a94b1510f6a46ec48494b52ee8f67eb4fc836Patch
- https://git.kernel.org/stable/c/a6b87bfc2ab5bccb7ad953693c85d9062aef3fddPatch
- https://git.kernel.org/stable/c/d3b504146c111548ab60b6ef7aad00bfb1db05a2Patch
- https://git.kernel.org/stable/c/eeeaba737919bdce9885e2a00ac2912f61a3684d
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.