can: peak_usb: peak_usb_start(): fix double free of transfer buffer on URB submit error

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-74456
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 13:17:50 UTC
Updated2026-08-19 17:21:02 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: can: peak_usb: peak_usb_start(): fix double free of transfer buffer on URB submit error In peak_usb_start(), each RX URB transfer buffer is allocated with kmalloc() and the URB is flagged URB_FREE_BUFFER so that the final usb_free_urb() also frees the transfer buffer. If usb_submit_urb() fails, the error path frees the buffer explicitly with kfree(buf) and then calls usb_free_urb(urb). Because URB_FREE_BUFFER is set, usb_free_urb() -> urb_destroy() frees the same buffer a second time, a double free of the transfer buffer. BUG: KASAN: double-free in usb_free_urb.part.0+0x91/0xb0 Free of addr ffff8881069ccb80 by task trigger.sh/285 Call Trace: kfree+0x113/0x3c0 usb_free_urb.part.0+0x91/0xb0 Drop the redundant kfree(buf); usb_free_urb() already releases the transfer buffer. This mirrors commit 03819abbeb11 ("net: usb: lan78xx: Fix double free issue with interrupt buffer allocation").

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.001290000 probability, percentile 0.029420000 (date 2026-08-19)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d 914c3b8fa175acf8476ad31cf04e308638e3578e git Not specified
CNA Linux Linux affected bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d 5f2fa5840c34d3a558c57855781be75e03bef752 git Not specified
CNA Linux Linux affected bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d b9088d581fff971a7eb1628f8dcc30df6cfef4dc git Not specified
CNA Linux Linux affected bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d 525640b93d3e5f82f4ebea4730f4e0cf799522ba git Not specified
CNA Linux Linux affected bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d 4bb3325075138dd5346b71589a959878b564dc0b git Not specified
CNA Linux Linux affected bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d 92d0de80ca2223b9c7da78020155b6cb27824cc0 git Not specified
CNA Linux Linux affected bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d dfb17bf04a764462000f11258a7c06aa92d1f261 git Not specified
CNA Linux Linux affected bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d 9b3d5a6d952c38bbcf07f903cbeadefdb56b9bc9 git Not specified
CNA Linux Linux affected 3.4 Not specified
CNA Linux Linux unaffected 3.4 semver Not specified
CNA Linux Linux unaffected 5.10.265 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.216 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.183 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.151 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.103 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.44 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.8 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/b9088d581fff971a7eb1628f8dcc30df6cfef4dc 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/5f2fa5840c34d3a558c57855781be75e03bef752 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9b3d5a6d952c38bbcf07f903cbeadefdb56b9bc9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/525640b93d3e5f82f4ebea4730f4e0cf799522ba 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/92d0de80ca2223b9c7da78020155b6cb27824cc0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4bb3325075138dd5346b71589a959878b564dc0b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/914c3b8fa175acf8476ad31cf04e308638e3578e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/dfb17bf04a764462000f11258a7c06aa92d1f261 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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