habanalabs: fix UAF in export_dmabuf()
In the Linux kernel, the following vulnerability has been resolved: habanalabs: fix UAF in export_dmabuf() As soon as we'd inserted a file reference into descriptor table, another thread could close it. That's fine for the case when all we are doing is returning that descriptor to userland (it's a race, but it's a userland race and there's nothing the kernel can do about it). However, if we follow fd_install() with any kind of access to objects that would be destroyed on close (be it the struct file itself or anything destroyed by its ->release()), we have a UAF. dma_buf_fd() is a combination of reserving a descriptor and fd_install(). habanalabs export_dmabuf() calls it and then proceeds to access the objects destroyed on close. In particular, it grabs an extra reference to another struct file that will be dropped as part of ->release() for ours; that "will be" is actually "might have already been". Fix that by reserving descriptor before anything else and do fd_install() only when everything had been set up. As a side benefit, we no longer have the failure exit with file already created, but reference to underlying file (as well as ->dmabuf_export_cnt, etc.) not grabbed yet; unlike dma_buf_fd(), fd_install() can't fail.
CVE-2025-38722
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-2025-38722
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": "db1a8dd916aac986871f6b873a3aefad906f383a",
"lessThan": "d26058c2349d77d1ef179a2cc9752ca12004b6ff",
"versionType": "git"
},
{
"status": "affected",
"version": "db1a8dd916aac986871f6b873a3aefad906f383a",
"lessThan": "c07886761fd6251db6938d4e747002e3d150d231",
"versionType": "git"
},
{
"status": "affected",
"version": "db1a8dd916aac986871f6b873a3aefad906f383a",
"lessThan": "40deceb38f9db759772d1c289c28fd2a543f57fc",
"versionType": "git"
},
{
"status": "affected",
"version": "db1a8dd916aac986871f6b873a3aefad906f383a",
"lessThan": "55c232d7e0241f1d5120b595e7a9de24c75ed3d8",
"versionType": "git"
},
{
"status": "affected",
"version": "db1a8dd916aac986871f6b873a3aefad906f383a",
"lessThan": "33927f3d0ecdcff06326d6e4edb6166aed42811c",
"versionType": "git"
}
],
"programFiles": [
"drivers/accel/habanalabs/common/memory.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.16"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.16",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.43",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.15.11",
"versionType": "semver",
"lessThanOrEqual": "6.15.*"
},
{
"status": "unaffected",
"version": "6.16.2",
"versionType": "semver",
"lessThanOrEqual": "6.16.*"
},
{
"status": "unaffected",
"version": "6.17",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/accel/habanalabs/common/memory.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-38722
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #46012 · Revision 1
- Added to Heist Feed
- Publisher date