Skip to content
Heist/ feed
High

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

Type: advisorySource: Official CVE List1 source record

In 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").

Announced Source revision 1
Original source ↗

CVE-2026-74456

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-74456

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d",
        "lessThan": "914c3b8fa175acf8476ad31cf04e308638e3578e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d",
        "lessThan": "5f2fa5840c34d3a558c57855781be75e03bef752",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d",
        "lessThan": "b9088d581fff971a7eb1628f8dcc30df6cfef4dc",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d",
        "lessThan": "525640b93d3e5f82f4ebea4730f4e0cf799522ba",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d",
        "lessThan": "4bb3325075138dd5346b71589a959878b564dc0b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d",
        "lessThan": "92d0de80ca2223b9c7da78020155b6cb27824cc0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d",
        "lessThan": "dfb17bf04a764462000f11258a7c06aa92d1f261",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d",
        "lessThan": "9b3d5a6d952c38bbcf07f903cbeadefdb56b9bc9",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/net/can/usb/peak_usb/pcan_usb_core.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.4"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.4",
        "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": [
      "drivers/net/can/usb/peak_usb/pcan_usb_core.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-74456

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#33159 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement