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CVE PROGRAM SOURCE RECORD7.8 High

CVE-2025-40269

ALSA: usb-audio: Fix potential overflow of PCM transfer buffer

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Fix potential overflow of PCM transfer buffer The PCM stream data in USB-audio driver is transferred over USB URB packet buffers, and each packet size is determined dynamically. The packet sizes are limited by some factors such as wMaxPacketSize USB descriptor. OTOH, in the current code, the actually used packet sizes are determined only by the rate and the PPS, which may be bigger than the size limit above. This results in a buffer overflow, as reported by syzbot. Basically when the limit is smaller than the calculated packet size, it implies that something is wrong, most likely a weird USB descriptor. So the best option would be just to return an error at the parameter setup time before doing any further operations. This patch introduces such a sanity check, and returns -EINVAL when the packet size is greater than maxpacksize. The comparison with ep->packsize[1] alone should suffice since it's always equal or greater than ep->packsize[0].

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 02c56650f3c118d3752122996d96173d26bb13aa to < 480a1490c595a242f27493a4544b3efb21b29f6aaffected
  • 5ef30e443e6d3654cccecec99cf481a69a0a6d3b to < ab0b5e92fc36ee82c1bd01fe896d0f775ed5de41affected
  • 99703c921864a318e3e8aae74fde071b1ff35bea to < 282aba56713bbc58155716b55ca7222b2d9cf3c8affected
  • 2d50acd7dbd0682a56968ad9551341d7fc5b6eaf to < c4dc012b027c9eb101583011089dea14d744e314affected
  • aba41867dd66939d336fdf604e4d73b805d8039f to < e0ed5a36fb3ab9e7b9ee45cd17f09f6d5f594360affected
  • d288dc74f8cf95cb7ae0aaf245b7128627a49bf3 to < d67dde02049e632ba58d3c44a164a74b6a737154affected
  • f0bd62b64016508938df9babe47f65c2c727d25c to < 6a5da3fa80affc948923f20a4e086177f505e86eaffected
  • f0bd62b64016508938df9babe47f65c2c727d25c to < 217d47255a2ec8b246f2725f5db9ac3f1d4109d7affected
  • f0bd62b64016508938df9babe47f65c2c727d25c to < ef592bf2232a2daa9fffa8881881fc9957ea56e9affected
  • f0bd62b64016508938df9babe47f65c2c727d25c to < ece3b981bb6620e47fac826a2156c090b1a936a0affected
  • f0bd62b64016508938df9babe47f65c2c727d25c to < 98e9d5e33bda8db875cc1a4fe99c192658e45ab6affected
  • f0bd62b64016508938df9babe47f65c2c727d25c to < d2c04f20ccc6c0d219e6d3038bab45bc66a178adaffected
  • f0bd62b64016508938df9babe47f65c2c727d25c to < 05a1fc5efdd8560f34a3af39c9cf1e1526cc3ddfaffected
  • 4.4.229 to < 4.4.230affected
  • 4.9.229 to < 4.9.230affected
  • 4.14.186 to < 4.14.188affected
  • 4.19.130 to < 4.19.132affected
  • 5.4.49 to < 5.4.51affected
  • 5.7.6 to < 5.7.8affected

Linux Linux

Default version status: affected

  • 5.8affected
  • 0 to < 5.8unaffected
  • 4.4.230 to ≤ 4.4.*unaffected
  • 4.9.230 to ≤ 4.9.*unaffected
  • 4.14.188 to ≤ 4.14.*unaffected
  • 4.19.132 to ≤ 4.19.*unaffected
  • 5.4.51 to ≤ 5.4.*unaffected
  • 5.7.8 to ≤ 5.7.*unaffected
  • 5.10.247 to ≤ 5.10.*unaffected
  • 5.15.197 to ≤ 5.15.*unaffected
  • 6.1.159 to ≤ 6.1.*unaffected
  • 6.6.117 to ≤ 6.6.*unaffected
  • 6.12.59 to ≤ 6.12.*unaffected
  • 6.17.9 to ≤ 6.17.*unaffected
  • 6.18 to ≤ *unaffected

References