CVE-2026-74497
ALSA USB-audio frame-size clamp flaw can allow oversized packets to crash the kernel.
Is CVE-2026-74497 being exploited?
Not confirmed. CVE-2026-74497 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.14% probability of exploitation in the next 30 days.
How severe is CVE-2026-74497?
CVE-2026-74497 is rated High with a CVSS score of 8.4. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-74497?
Yes. A fix has been recorded for CVE-2026-74497. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-74497 affect?
CVE-2026-74497 affects Linux kernel (ALSA usb-audio), Linux distributions shipping vulnerable kernels, Embedded devices with USB audio support. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-74497?
Apply vendor/kernel updates and block untrusted USB devices.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Local attacker with a malicious USB audio device can cause kernel memory corruption, leading to crashes (DoS) or possible privilege escalation.
Patch when possible
- affected>= 28acb12014fb0c3e1edfdab1b1e3e266cf651550 and < 2d39fea6d3c19a2f5811d123114d92e3d0115fd1
- affected>= 28acb12014fb0c3e1edfdab1b1e3e266cf651550 and < 09cf3dbbb4256a43feb91d2f51f274510a9ada47
- affected>= 28acb12014fb0c3e1edfdab1b1e3e266cf651550 and < cfa8d3e0e8b812c4db4d5241f62b6bdbab2bd7be
- affected>= 28acb12014fb0c3e1edfdab1b1e3e266cf651550 and < 56ac3e7c90f6b45969c3fd07a98fad760ffd6901
- affected>= 28acb12014fb0c3e1edfdab1b1e3e266cf651550 and < be97fea7451d758881b95af78e900dd0d58a382a
- affected>= 28acb12014fb0c3e1edfdab1b1e3e266cf651550 and < 2db4535d6af79276a64449201c5be5feffb31c64
- affected>= 28acb12014fb0c3e1edfdab1b1e3e266cf651550 and < 53f0aa37eb945f3c983f61d12fc35eb33debb8a9
- affected>= 28acb12014fb0c3e1edfdab1b1e3e266cf651550 and < 8d7a30c50c2e58a6839634ed0acde14466d1dc61
- affected3.8
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.