- 5.5MediumCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 97% 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: tracepoint: balance regfunc() on func_add() failure in tracepoint_add_func() When a tracepoint goes through the 0 -> 1 transition, tracepoint_add_func() invokes the subsystem's ext->regfunc() before attempting to install the new probe via func_add(). If func_add() then fails (for example, when allocate_probes() cannot allocate a new probe array under memory pressure and returns -ENOMEM), the function returns the error without calling the matching ext->unregfunc(), leaving the side effects of regfunc() behind with no installed probe to justify them. For syscall tracepoints this is particularly unpleasant: syscall_regfunc() bumps sys_tracepoint_refcount and sets SYSCALL_TRACEPOINT on every task. After a leaked failure, the refcount is stuck at a non-zero value with no consumer, and every task continues paying the syscall trace entry/exit overhead until reboot. Other subsystems providing regfunc()/unregfunc() pairs exhibit similarly scoped persistent state. Mirror the existing 1 -> 0 cleanup and call ext->unregfunc() in the func_add() error path, gated on the same condition used there so the unwind is symmetric with the registration.
Timeline
ID reserved
By Linux
- 15 days later
· 15 days later
Published
- 5 months later
· 5 months 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 |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.13% · top 97% of all CVEs (11 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 8cf868affdc459beee1a941df0cfaba1673740e3 – < 5787052e5f69beb649f3d6a80a8aa37d9e683e4e
- affected 8cf868affdc459beee1a941df0cfaba1673740e3 – < 4f1756d043e56ea2e9a6c858fb290a0cf6fc2251
- affected 8cf868affdc459beee1a941df0cfaba1673740e3 – < 36ff362235307af95152d510b53c2d9b8773a342
- affected 8cf868affdc459beee1a941df0cfaba1673740e3 – < 247ed8a969f981bfba3112fd4bb441eaa6cef59c
- affected 8cf868affdc459beee1a941df0cfaba1673740e3 – < 7bcadb3c2bc1cf60690e931aadd35fb7bd646a49
- affected 8cf868affdc459beee1a941df0cfaba1673740e3 – < 2c5b8eeea006eb694c81631cd5713d494b80be90
- affected 8cf868affdc459beee1a941df0cfaba1673740e3 – < 342829e042ac00f3d68d442ea92873fb6683f494
- affected 8cf868affdc459beee1a941df0cfaba1673740e3 – < fad217e16fded7f3c09f8637b0f6a224d58b5f2e
- affected 4.10
- unaffected < 4.10
- unaffected 5.10.259 – ≤ 5.10.*
- unaffected 5.15.210 – ≤ 5.15.*
- unaffected 6.1.176 – ≤ 6.1.*
- unaffected 6.6.140 – ≤ 6.6.*
- unaffected 6.12.88 – ≤ 6.12.*
- unaffected 6.18.30 – ≤ 6.18.*
- unaffected 7.0.7 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References9
- https://git.kernel.org/stable/c/5787052e5f69beb649f3d6a80a8aa37d9e683e4e (opens in a new tab)
- https://git.kernel.org/stable/c/4f1756d043e56ea2e9a6c858fb290a0cf6fc2251 (opens in a new tab)
- https://git.kernel.org/stable/c/36ff362235307af95152d510b53c2d9b8773a342 (opens in a new tab)
- https://git.kernel.org/stable/c/247ed8a969f981bfba3112fd4bb441eaa6cef59c (opens in a new tab)
- https://git.kernel.org/stable/c/7bcadb3c2bc1cf60690e931aadd35fb7bd646a49 (opens in a new tab)
- https://git.kernel.org/stable/c/2c5b8eeea006eb694c81631cd5713d494b80be90 (opens in a new tab)
- https://git.kernel.org/stable/c/342829e042ac00f3d68d442ea92873fb6683f494 (opens in a new tab)
- https://git.kernel.org/stable/c/fad217e16fded7f3c09f8637b0f6a224d58b5f2e (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html (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-2026-32823 (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-2026-46196)Record last updated .