In the Linux kernel, the following vulnerability has been resolved: HID: core: Harden s32ton() against conversion to 0 bits Testing by the syzbot… (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 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.
AI Analysis
Technical Summary
The advisory covers three kernel vulnerabilities in Red Hat Enterprise Linux 10. CVE-2025-38556 involves hardening the HID core function s32ton() to prevent conversion to zero bits, addressing a potential memory or data handling issue. CVE-2025-39761 fixes the ath12k wifi driver to properly decrement TID on RX peer fragment setup errors, improving error handling. CVE-2025-39757 enhances validation of UAC3 cluster segment descriptors in the ALSA usb-audio driver to prevent malformed descriptor issues. Red Hat has released updated kernel packages containing these fixes, requiring system reboot for activation. The advisory rates these issues as moderate in severity and no active exploitation has been reported.
Potential Impact
The vulnerabilities affect the Linux kernel core and specific drivers (HID, wifi ath12k, ALSA usb-audio) in Red Hat Enterprise Linux 10. They could potentially lead to improper data handling or error processing within kernel components, which might affect system stability or security. However, no known exploits in the wild have been reported, and Red Hat rates the overall impact as moderate.
Mitigation Recommendations
Red Hat has released updated kernel packages for Red Hat Enterprise Linux 10 that address these vulnerabilities. Users should apply the official kernel update as provided in advisory RHSA-2025:17776 and reboot their systems to ensure the fixes take effect. For detailed update instructions, refer to https://access.redhat.com/articles/11258. There are no indications that additional mitigations are required beyond applying the official update and rebooting.
In the Linux kernel, the following vulnerability has been resolved: HID: core: Harden s32ton() against conversion to 0 bits Testing by the syzbot… (CVE-2025-38556)
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 v3.1
Score 7.1high
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The advisory covers three kernel vulnerabilities in Red Hat Enterprise Linux 10. CVE-2025-38556 involves hardening the HID core function s32ton() to prevent conversion to zero bits, addressing a potential memory or data handling issue. CVE-2025-39761 fixes the ath12k wifi driver to properly decrement TID on RX peer fragment setup errors, improving error handling. CVE-2025-39757 enhances validation of UAC3 cluster segment descriptors in the ALSA usb-audio driver to prevent malformed descriptor issues. Red Hat has released updated kernel packages containing these fixes, requiring system reboot for activation. The advisory rates these issues as moderate in severity and no active exploitation has been reported.
Potential Impact
The vulnerabilities affect the Linux kernel core and specific drivers (HID, wifi ath12k, ALSA usb-audio) in Red Hat Enterprise Linux 10. They could potentially lead to improper data handling or error processing within kernel components, which might affect system stability or security. However, no known exploits in the wild have been reported, and Red Hat rates the overall impact as moderate.
Mitigation Recommendations
Red Hat has released updated kernel packages for Red Hat Enterprise Linux 10 that address these vulnerabilities. Users should apply the official kernel update as provided in advisory RHSA-2025:17776 and reboot their systems to ensure the fixes take effect. For detailed update instructions, refer to https://access.redhat.com/articles/11258. There are no indications that additional mitigations are required beyond applying the official update and rebooting.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2025:17776
- Cve Count
- 3
- Additional Cves
- ["CVE-2025-39757","CVE-2025-39761"]
Threat ID: 6a3da1e04853345fc182ba09
Added to database: 06/25/2026, 21:47:12 UTC
Last enriched: 06/25/2026, 22:28:01 UTC
Last updated: 09/10/2026, 19:24:56 UTC
Views: 37
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