kprobes: Protect kprobe_blacklist with RCU
In the Linux kernel, the following vulnerability has been resolved: kprobes: Protect kprobe_blacklist with RCU __within_kprobe_blacklist() traverses kprobe_blacklist without holding kprobe_mutex. When a module is unloaded, kprobe_remove_area_blacklist() removes blacklist entries and immediately frees them with kfree(). A concurrent call to within_kprobe_blacklist() can therefore dereference freed memory. Furthermore, within_kprobe_blacklist() can be called in atomic or non-preemptible contexts where the sleeping kprobe_mutex cannot be taken. Protect kprobe_blacklist with RCU. Use guard(rcu)() and list_for_each_entry_rcu() for traversal, list_add_tail_rcu() for insertions, list_del_rcu() for deletions, and kfree_rcu() to reclaim entries safely after a grace period.
CVE-2026-89988
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-2026-89988
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": "376e242429bf8539ef39a080ac113c8799840b13",
"lessThan": "8f406205003f741225f620f0e357ca0de71d45e3",
"versionType": "git"
},
{
"status": "affected",
"version": "376e242429bf8539ef39a080ac113c8799840b13",
"lessThan": "630ed8734a02b992e8a97538179c2ece42c5210f",
"versionType": "git"
},
{
"status": "affected",
"version": "376e242429bf8539ef39a080ac113c8799840b13",
"lessThan": "518d9b5568bb06f86e4434f7a30faa9612ea91ad",
"versionType": "git"
},
{
"status": "affected",
"version": "376e242429bf8539ef39a080ac113c8799840b13",
"lessThan": "5da247e4d1e8661d4d6f997101d59967e8994e32",
"versionType": "git"
},
{
"status": "affected",
"version": "376e242429bf8539ef39a080ac113c8799840b13",
"lessThan": "6e62cf983a2bd547e6bbd3f935539233e5f97f8f",
"versionType": "git"
},
{
"status": "affected",
"version": "376e242429bf8539ef39a080ac113c8799840b13",
"lessThan": "0c4256196b3a105307e2235fbfd85e768bbcdd0f",
"versionType": "git"
}
],
"programFiles": [
"include/linux/kprobes.h",
"kernel/kprobes.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.16"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.16",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.51",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.5",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"include/linux/kprobes.h",
"kernel/kprobes.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89988
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #36423 · Revision 1
- Added to Heist Feed
- Publisher date