8.4

CVE-2026-74497: ALSA: usb-audio: Clamp frame size in implicit-feedback mode

Received
AliasesUBUNTU-CVE-2026-74497DEBIAN-CVE-2026-74497
Published 15-08-2026Last modified 16-10-2026

Vulnerability summary

CVE-2026-74497 is a high (CVSS 8.4) vulnerability in linux. EPSS estimates a 0.14% chance of exploitation in the next 30 days, higher than 3.5% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 8.4, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
8.4/10
010
High · v3.1 (CVE.org)
EPSS score
0.14%
0%100%
Low · -0.05 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 12 · Related 9
SUSE-SU-2026:4687-1SUSE-SU-2026:5091-1USN-8875-1USN-8875-2USN-8876-1USN-8877-1

Timeline

  1. 15-08-2026
    PublishedVulnerability first disclosed.
  2. 16-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Clamp frame size in implicit-feedback mode snd_usb_handle_sync_urb() scales received sync packet sizes by the sender's stride and stores the result directly in out_packet->packet_size[i]. If a connected USB device sends an oversized sync packet, this frame count can exceed ep->maxframesize. The un-clamped frame count then propagates to the playback endpoint queue, potentially driving packet transfers beyond the endpoint's hardware frame limits. Cap the calculated frame count against ep->maxframesize in snd_usb_handle_sync_urb() to prevent oversized packets from entering the playback queue.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.14%

Chance of exploitation in the next 30 days

Percentile

4%

Versus all other CVEs

30-day change

Decrease -0.05 pp

From 0.20% on 06-10-2026

06-10-202605-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: local access, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu169 products
  • linuxAll versions (No fix recorded) | < 5.15.0-198.208 | < 7.0.0-42.42
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1117.124 | < 7.0.0-1016.17
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linux< 6.1.187-1 | < 6.12.105-1 | < 7.1.8-1
  • linux-6.12< 6.12.107-1~deb12u1
Linux1 product
  • linux≥ 28acb12014fb0c3e1edfdab1b1e3e266cf651550, < 2d39fea6d3c19a2f5811d123114d92e3d0115fd1 | ≥ 28acb12014fb0c3e1edfdab1b1e3e266cf651550, < 09cf3dbbb4256a43feb91d2f51f274510a9ada47 | ≥ 28acb12014fb0c3e1edfdab1b1e3e266cf651550, < cfa8d3e0e8b812c4db4d5241f62b6bdbab2bd7be | ≥ 28acb12014fb0c3e1edfdab1b1e3e266cf651550, < 56ac3e7c90f6b45969c3fd07a98fad760ffd6901 | ≥ 28acb12014fb0c3e1edfdab1b1e3e266cf651550, < be97fea7451d758881b95af78e900dd0d58a382a | ≥ 28acb12014fb0c3e1edfdab1b1e3e266cf651550, < 2db4535d6af79276a64449201c5be5feffb31c64 | ≥ 28acb12014fb0c3e1edfdab1b1e3e266cf651550, < 53f0aa37eb945f3c983f61d12fc35eb33debb8a9 | ≥ 28acb12014fb0c3e1edfdab1b1e3e266cf651550, < 8d7a30c50c2e58a6839634ed0acde14466d1dc61 | 3.8

3 vendors · 172 products

References

22 links
Show all 22 references