0.0
NA
CVE-2026-74498
ALSA: usb-audio: Fix DMA buffer out-of-bounds write when fill_max is set
Overview
Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Fix DMA buffer out-of-bounds write when fill_max is set When a USB audio endpoint requests full packet transfers via the fill_max descriptor flag, data_ep_set_params() promotes ep->curpacksize to ep->maxpacksize. However, maxsize is left at the original sample-rate derived value. Since u->buffer_size is allocated as maxsize * packets, the resulting DMA buffer is far too small for the requested transfer length. When the USB host controller streams up to curpacksize bytes per packet, it writes past the end of the buffer via DMA, corrupting kernel heap memory. Update maxsize to curpacksize when fill_max is set so that the allocated DMA buffer size matches the actual transfer request size. [ changed to reassign maxsize only when ep->fill_max is set -- tiwai ]
Details
INFO
Published Date :
Aug. 15, 2026, 1:17 p.m.
Last Modified :
Aug. 19, 2026, 5:21 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
Fix DMA buffer out-of-bounds write by updating maxsize when fill_max is set.
- Update maxsize to curpacksize when fill_max is set.
- Ensure DMA buffer size matches transfer request size.
- Apply the patch to the ALSA USB audio driver.
- Update the Linux kernel to a secure version.
References
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CVE-2026-74498.
CWE - Common Weakness Enumeration
While CVE identifies
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associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
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stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-74498
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following table lists the changes that have been made to the
CVE-2026-74498 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 19, 2026
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/10c24e6fddf4bdff0b6b05a47a4347b38e6960e8 Added Reference https://git.kernel.org/stable/c/6cbdd11f9b05b92f4aa29f09a66e19ed0e25e66c Added Reference https://git.kernel.org/stable/c/b1770f9ac35c0ffc34914d52347c65dcd5ac049b Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '8fdff6a319e7dac757c558bd283dc4577e68cde7', 'lessThan': '3852974608f53e530e27c21d0c6c7d79c17b3f5a', 'versionType': 'git'}, {'status': 'affected', 'version': '8fdff6a319e7dac757c558bd283dc4577e68cde7', 'lessThan': 'f9b6c9576568169139ac151f7881474f384659fd', 'versionType': 'git'}, {'status': 'affected', 'version': '8fdff6a319e7dac757c558bd283dc4577e68cde7', 'lessThan': '04595233e5606d452f9f47e6989fc7ae7440fd40', 'versionType': 'git'}, {'status': 'affected', 'version': '8fdff6a319e7dac757c558bd283dc4577e68cde7', 'lessThan': 'bd65b7191683bebd9923904f0558b9211b9129da', 'versionType': 'git'}, {'status': 'affected', 'version': '8fdff6a319e7dac757c558bd283dc4577e68cde7', 'lessThan': 'd0199ae1666ff9ae2d1d568d64c3430d4c47f0e5', 'versionType': 'git'}], 'programFiles': ['sound/usb/endpoint.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.5'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.5', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.151', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.103', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.44', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.8', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['sound/usb/endpoint.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '8fdff6a319e7dac757c558bd283dc4577e68cde7', 'lessThan': '10c24e6fddf4bdff0b6b05a47a4347b38e6960e8', 'versionType': 'git'}, {'status': 'affected', 'version': '8fdff6a319e7dac757c558bd283dc4577e68cde7', 'lessThan': 'b1770f9ac35c0ffc34914d52347c65dcd5ac049b', 'versionType': 'git'}, {'status': 'affected', 'version': '8fdff6a319e7dac757c558bd283dc4577e68cde7', 'lessThan': '6cbdd11f9b05b92f4aa29f09a66e19ed0e25e66c', 'versionType': 'git'}, {'status': 'affected', 'version': '8fdff6a319e7dac757c558bd283dc4577e68cde7', 'lessThan': '3852974608f53e530e27c21d0c6c7d79c17b3f5a', 'versionType': 'git'}, {'status': 'affected', 'version': '8fdff6a319e7dac757c558bd283dc4577e68cde7', 'lessThan': 'f9b6c9576568169139ac151f7881474f384659fd', 'versionType': 'git'}, {'status': 'affected', 'version': '8fdff6a319e7dac757c558bd283dc4577e68cde7', 'lessThan': '04595233e5606d452f9f47e6989fc7ae7440fd40', 'versionType': 'git'}, {'status': 'affected', 'version': '8fdff6a319e7dac757c558bd283dc4577e68cde7', 'lessThan': 'bd65b7191683bebd9923904f0558b9211b9129da', 'versionType': 'git'}, {'status': 'affected', 'version': '8fdff6a319e7dac757c558bd283dc4577e68cde7', 'lessThan': 'd0199ae1666ff9ae2d1d568d64c3430d4c47f0e5', 'versionType': 'git'}], 'programFiles': ['sound/usb/endpoint.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.5'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.5', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.265', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.216', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.183', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.151', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.103', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.44', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.8', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['sound/usb/endpoint.c'], 'defaultStatus': 'affected'}] -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '8fdff6a319e7dac757c558bd283dc4577e68cde7', 'lessThan': '3852974608f53e530e27c21d0c6c7d79c17b3f5a', 'versionType': 'git'}, {'status': 'affected', 'version': '8fdff6a319e7dac757c558bd283dc4577e68cde7', 'lessThan': 'f9b6c9576568169139ac151f7881474f384659fd', 'versionType': 'git'}, {'status': 'affected', 'version': '8fdff6a319e7dac757c558bd283dc4577e68cde7', 'lessThan': '04595233e5606d452f9f47e6989fc7ae7440fd40', 'versionType': 'git'}, {'status': 'affected', 'version': '8fdff6a319e7dac757c558bd283dc4577e68cde7', 'lessThan': 'bd65b7191683bebd9923904f0558b9211b9129da', 'versionType': 'git'}, {'status': 'affected', 'version': '8fdff6a319e7dac757c558bd283dc4577e68cde7', 'lessThan': 'd0199ae1666ff9ae2d1d568d64c3430d4c47f0e5', 'versionType': 'git'}], 'programFiles': ['sound/usb/endpoint.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.5'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.5', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.151', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.103', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.44', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.8', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc6', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['sound/usb/endpoint.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '8fdff6a319e7dac757c558bd283dc4577e68cde7', 'lessThan': '3852974608f53e530e27c21d0c6c7d79c17b3f5a', 'versionType': 'git'}, {'status': 'affected', 'version': '8fdff6a319e7dac757c558bd283dc4577e68cde7', 'lessThan': 'f9b6c9576568169139ac151f7881474f384659fd', 'versionType': 'git'}, {'status': 'affected', 'version': '8fdff6a319e7dac757c558bd283dc4577e68cde7', 'lessThan': '04595233e5606d452f9f47e6989fc7ae7440fd40', 'versionType': 'git'}, {'status': 'affected', 'version': '8fdff6a319e7dac757c558bd283dc4577e68cde7', 'lessThan': 'bd65b7191683bebd9923904f0558b9211b9129da', 'versionType': 'git'}, {'status': 'affected', 'version': '8fdff6a319e7dac757c558bd283dc4577e68cde7', 'lessThan': 'd0199ae1666ff9ae2d1d568d64c3430d4c47f0e5', 'versionType': 'git'}], 'programFiles': ['sound/usb/endpoint.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.5'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.5', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.151', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.103', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.44', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.8', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['sound/usb/endpoint.c'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 15, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '8fdff6a319e7dac757c558bd283dc4577e68cde7', 'lessThan': '3852974608f53e530e27c21d0c6c7d79c17b3f5a', 'versionType': 'git'}, {'status': 'affected', 'version': '8fdff6a319e7dac757c558bd283dc4577e68cde7', 'lessThan': 'f9b6c9576568169139ac151f7881474f384659fd', 'versionType': 'git'}, {'status': 'affected', 'version': '8fdff6a319e7dac757c558bd283dc4577e68cde7', 'lessThan': '04595233e5606d452f9f47e6989fc7ae7440fd40', 'versionType': 'git'}, {'status': 'affected', 'version': '8fdff6a319e7dac757c558bd283dc4577e68cde7', 'lessThan': 'bd65b7191683bebd9923904f0558b9211b9129da', 'versionType': 'git'}, {'status': 'affected', 'version': '8fdff6a319e7dac757c558bd283dc4577e68cde7', 'lessThan': 'd0199ae1666ff9ae2d1d568d64c3430d4c47f0e5', 'versionType': 'git'}], 'programFiles': ['sound/usb/endpoint.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.5'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.5', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.151', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.103', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.44', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.8', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc6', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['sound/usb/endpoint.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Fix DMA buffer out-of-bounds write when fill_max is set When a USB audio endpoint requests full packet transfers via the fill_max descriptor flag, data_ep_set_params() promotes ep->curpacksize to ep->maxpacksize. However, maxsize is left at the original sample-rate derived value. Since u->buffer_size is allocated as maxsize * packets, the resulting DMA buffer is far too small for the requested transfer length. When the USB host controller streams up to curpacksize bytes per packet, it writes past the end of the buffer via DMA, corrupting kernel heap memory. Update maxsize to curpacksize when fill_max is set so that the allocated DMA buffer size matches the actual transfer request size. [ changed to reassign maxsize only when ep->fill_max is set -- tiwai ] Added Reference https://git.kernel.org/stable/c/04595233e5606d452f9f47e6989fc7ae7440fd40 Added Reference https://git.kernel.org/stable/c/3852974608f53e530e27c21d0c6c7d79c17b3f5a Added Reference https://git.kernel.org/stable/c/bd65b7191683bebd9923904f0558b9211b9129da Added Reference https://git.kernel.org/stable/c/d0199ae1666ff9ae2d1d568d64c3430d4c47f0e5 Added Reference https://git.kernel.org/stable/c/f9b6c9576568169139ac151f7881474f384659fd
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being observed over the next 30 days. Following chart shows the EPSS
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