dmaengine: idxd: fix double free of wq, engine, and group structs
In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: fix double free of wq, engine, and group structs The release callbacks for wq, engine, and group devices (idxd_conf_wq_release, idxd_conf_engine_release, idxd_conf_group_release) each call kfree() on the enclosing struct. The setup error paths and cleanup functions also call kfree() explicitly after put_device(), producing a double free whenever put_device() drops the reference count to zero and fires the release. In the setup functions, device_initialize() is called before device_add(), so the reference count is exactly 1 at the error sites. put_device() unconditionally fires the release, which frees the struct; the subsequent explicit kfree() then operates on freed memory. For idxd_setup_wqs(), the wq release callback also owns opcap_bmap and wqcfg. The error unwind additionally freed those fields explicitly before calling put_device(), causing further double frees on both. Remove the redundant explicit kfree() calls from all setup error paths and cleanup functions for wq, engine, and group structs, delegating sole ownership of those allocations to the release callbacks.
CVE-2026-80698
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-2026-80698
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": "7c5dd23e57c14cf7177b8a5e0fd08916e0c60005",
"lessThan": "84cf00b1376c717e55d704dc259483e822ae1b34",
"versionType": "git"
},
{
"status": "affected",
"version": "7c5dd23e57c14cf7177b8a5e0fd08916e0c60005",
"lessThan": "38208445c41a6164e26748c600f954296991364d",
"versionType": "git"
},
{
"status": "affected",
"version": "7c5dd23e57c14cf7177b8a5e0fd08916e0c60005",
"lessThan": "63844dc03960b09b36746eda636c08f1479407ce",
"versionType": "git"
},
{
"status": "affected",
"version": "7c5dd23e57c14cf7177b8a5e0fd08916e0c60005",
"lessThan": "c93a9f652b7373ac8ee5bfcc18a9af76959b6c6c",
"versionType": "git"
},
{
"status": "affected",
"version": "7c5dd23e57c14cf7177b8a5e0fd08916e0c60005",
"lessThan": "ec2d428b2e32dd157de8f86a86dd85c5b2c8f45c",
"versionType": "git"
},
{
"status": "affected",
"version": "394e179f51fce06d6bb8ca5af8fa53f33c718cf4",
"versionType": "git"
},
{
"status": "affected",
"version": "b09ad63775f58a8de3e228f59fb9543bfd964c9c",
"versionType": "git"
},
{
"status": "affected",
"version": "26c219e7522c494f7865a928c81ced84cc7db3ae",
"versionType": "git"
},
{
"status": "affected",
"version": "35ea8721d9e6e74c6847cf4d6c27e883b00b0331",
"versionType": "git"
},
{
"status": "affected",
"version": "e6f86fe368cdc14764833a6e8bb59f7a85a40e06",
"versionType": "git"
},
{
"status": "affected",
"version": "1c28fd5f94d8996f7dd3805bd6a16ed46a5d0886",
"versionType": "git"
},
{
"status": "affected",
"version": "5.11.22",
"lessThan": "5.12",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.12.5",
"lessThan": "5.13",
"versionType": "semver"
}
],
"programFiles": [
"drivers/dma/idxd/init.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.13"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.13",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.57",
"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/dma/idxd/init.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-80698
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #46629 · Revision 1
- Added to Heist Feed
- Publisher date