ftrace: Also allocate and copy hash for reading of filter files
In the Linux kernel, the following vulnerability has been resolved: ftrace: Also allocate and copy hash for reading of filter files Currently the reader of set_ftrace_filter and set_ftrace_notrace just adds the pointer to the global tracer hash to its iterator. Unlike the writer that allocates a copy of the hash, the reader keeps the pointer to the filter hashes. This is problematic because this pointer is static across function calls that release the locks that can update the global tracer hashes. This can cause UAF and similar bugs. Allocate and copy the hash for reading the filter files like it is done for the writers. This not only fixes UAF bugs, but also makes the code a bit simpler as it doesn't have to differentiate when to free the iterator's hash between writers and readers.
CVE-2025-39689
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-2025-39689
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": "c20489dad156dd9919ebd854bbace46dbd2576a3",
"lessThan": "12064e1880fc9202be75ff668205b1703d92f74f",
"versionType": "git"
},
{
"status": "affected",
"version": "c20489dad156dd9919ebd854bbace46dbd2576a3",
"lessThan": "c4cd93811e038d19f961985735ef7bb128078dfb",
"versionType": "git"
},
{
"status": "affected",
"version": "c20489dad156dd9919ebd854bbace46dbd2576a3",
"lessThan": "e0b6b223167e1edde5c82edf38e393c06eda1f13",
"versionType": "git"
},
{
"status": "affected",
"version": "c20489dad156dd9919ebd854bbace46dbd2576a3",
"lessThan": "a40c69f4f1ed96acbcd62e9b5ff3a596f0a91309",
"versionType": "git"
},
{
"status": "affected",
"version": "c20489dad156dd9919ebd854bbace46dbd2576a3",
"lessThan": "3b114a3282ab1a12cb4618a8f45db5d7185e784a",
"versionType": "git"
},
{
"status": "affected",
"version": "c20489dad156dd9919ebd854bbace46dbd2576a3",
"lessThan": "c591ba1acd081d4980713e47869dd1cc3d963d19",
"versionType": "git"
},
{
"status": "affected",
"version": "c20489dad156dd9919ebd854bbace46dbd2576a3",
"lessThan": "64db338140d2bad99a0a8c6a118dd60b3e1fb8cb",
"versionType": "git"
},
{
"status": "affected",
"version": "c20489dad156dd9919ebd854bbace46dbd2576a3",
"lessThan": "bfb336cf97df7b37b2b2edec0f69773e06d11955",
"versionType": "git"
}
],
"programFiles": [
"kernel/trace/ftrace.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.12"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.12",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.4.297",
"versionType": "semver",
"lessThanOrEqual": "5.4.*"
},
{
"status": "unaffected",
"version": "5.10.241",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.190",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.149",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.103",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.44",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.16.4",
"versionType": "semver",
"lessThanOrEqual": "6.16.*"
},
{
"status": "unaffected",
"version": "6.17",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"kernel/trace/ftrace.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-39689
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #30619 · Revision 1
- Added to Heist Feed
- Publisher date