CVE-2026-89988kprobes: Protect kprobe_blacklist with RCU
- 7.8HighCVSS base score
- 0.17%Exploitation in 30 daysEPSS · top 94% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Linux
- 5 days later
· 5 days later
Published
- 44 days later
· 44 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.17% · top 94% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 376e242429bf8539ef39a080ac113c8799840b13 – < 3fb8386682ef4d0858c38bf0d8d8a47ba171fa23
- affected 376e242429bf8539ef39a080ac113c8799840b13 – < 5d97a13defc648c64d138145ace429b6a3d08943
- affected 376e242429bf8539ef39a080ac113c8799840b13 – < 8f406205003f741225f620f0e357ca0de71d45e3
- affected 376e242429bf8539ef39a080ac113c8799840b13 – < 630ed8734a02b992e8a97538179c2ece42c5210f
- affected 376e242429bf8539ef39a080ac113c8799840b13 – < 518d9b5568bb06f86e4434f7a30faa9612ea91ad
- affected 376e242429bf8539ef39a080ac113c8799840b13 – < 5da247e4d1e8661d4d6f997101d59967e8994e32
- affected 376e242429bf8539ef39a080ac113c8799840b13 – < 6e62cf983a2bd547e6bbd3f935539233e5f97f8f
- affected 376e242429bf8539ef39a080ac113c8799840b13 – < 0c4256196b3a105307e2235fbfd85e768bbcdd0f
- affected 3.16
- unaffected < 3.16
- unaffected 5.10.273 – ≤ 5.10.*
- unaffected 5.15.224 – ≤ 5.15.*
- unaffected 6.1.188 – ≤ 6.1.*
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.110 – ≤ 6.12.*
- unaffected 6.18.51 – ≤ 6.18.*
- unaffected 7.2.5 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References8
- https://git.kernel.org/stable/c/3fb8386682ef4d0858c38bf0d8d8a47ba171fa23 (opens in a new tab)
- https://git.kernel.org/stable/c/5d97a13defc648c64d138145ace429b6a3d08943 (opens in a new tab)
- https://git.kernel.org/stable/c/8f406205003f741225f620f0e357ca0de71d45e3 (opens in a new tab)
- https://git.kernel.org/stable/c/630ed8734a02b992e8a97538179c2ece42c5210f (opens in a new tab)
- https://git.kernel.org/stable/c/518d9b5568bb06f86e4434f7a30faa9612ea91ad (opens in a new tab)
- https://git.kernel.org/stable/c/5da247e4d1e8661d4d6f997101d59967e8994e32 (opens in a new tab)
- https://git.kernel.org/stable/c/6e62cf983a2bd547e6bbd3f935539233e5f97f8f (opens in a new tab)
- https://git.kernel.org/stable/c/0c4256196b3a105307e2235fbfd85e768bbcdd0f (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-80596 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-89988)Record last updated .