CVE-2026-99236tracing: Reject incomplete event filter expressions
- 7.8HighCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 98% 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: tracing: Reject incomplete event filter expressions A non-empty expression normally finishes in predicate_parse()'s inner loop, which resolves the pending logical operators before jumping to finalization. If the input ends after an operator, possibly followed by unary '!' tokens, the outer loop instead falls through with unresolved operator state. For example, "common_pid == 1 || common_pid == 2 &&" leaves prog[0].target equal to -1. The second pass then reads prog[-1] before the forward-jump check can reject it. Depending on adjacent slab contents, it can also copy an out-of-bounds word into a branch target that passes the forward-only check. A self-targeted perf tracepoint counting event can reach this path through PERF_EVENT_IOC_SET_FILTER. Reject the outer-loop fallthrough when a predicate has already been parsed. This ensures that non-empty expressions only reach finalization after the inner loop has resolved their operators. Keep the existing no-filter error for input that has no predicates. Add a regression test for trailing logical operators and unary negations.
Timeline
ID reserved
By Linux
- 38 days later
· 38 days later
Published
- 1 day later
· 1 day 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)
- 0.13% · top 98% 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 80765597bc587feae8dbc8ce97a0f32e12a6e625 – < 4a1a6d35359991c5d47f4bf101cfbe1475c94093
- affected 80765597bc587feae8dbc8ce97a0f32e12a6e625 – < 2a98f5d4913ec081e08e1075512cb7ec313d9f72
- affected 80765597bc587feae8dbc8ce97a0f32e12a6e625 – < 15ff3cc7f2beecc3f95d66358f20ad7b057466aa
- affected 80765597bc587feae8dbc8ce97a0f32e12a6e625 – < b205ff58e02922ac324f931cf9eb238a3acdb048
- affected 80765597bc587feae8dbc8ce97a0f32e12a6e625 – < 5a999b5a16530898f0dbe5f8c50fd45ea72e110b
- affected 80765597bc587feae8dbc8ce97a0f32e12a6e625 – < 1008e9e0b8280d47f1ab5e9c113f666a023a9697
- affected 80765597bc587feae8dbc8ce97a0f32e12a6e625 – < 64993d970dde2a2da353e9e99595a4fa88ec27d9
- affected 80765597bc587feae8dbc8ce97a0f32e12a6e625 – < 5bcdf3c18c3471122ee9652b0e2f5cdb718d9a46
- affected 80765597bc587feae8dbc8ce97a0f32e12a6e625 – < 1fdc4164e488916402badddbb1f51e9380dabb91
- affected 4.17
- unaffected < 4.17
- unaffected 5.10.273 – ≤ 5.10.*
- unaffected 5.15.224 – ≤ 5.15.*
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.161 – ≤ 6.6.*
- unaffected 6.12.115 – ≤ 6.12.*
- unaffected 6.18.60 – ≤ 6.18.*
- unaffected 7.2.14 – ≤ 7.2.*
- unaffected 7.3.1 – ≤ 7.3.*
- unaffected 7.4-rc1 – ≤ *
References
References9
- https://git.kernel.org/stable/c/4a1a6d35359991c5d47f4bf101cfbe1475c94093 (opens in a new tab)
- https://git.kernel.org/stable/c/2a98f5d4913ec081e08e1075512cb7ec313d9f72 (opens in a new tab)
- https://git.kernel.org/stable/c/15ff3cc7f2beecc3f95d66358f20ad7b057466aa (opens in a new tab)
- https://git.kernel.org/stable/c/b205ff58e02922ac324f931cf9eb238a3acdb048 (opens in a new tab)
- https://git.kernel.org/stable/c/5a999b5a16530898f0dbe5f8c50fd45ea72e110b (opens in a new tab)
- https://git.kernel.org/stable/c/1008e9e0b8280d47f1ab5e9c113f666a023a9697 (opens in a new tab)
- https://git.kernel.org/stable/c/64993d970dde2a2da353e9e99595a4fa88ec27d9 (opens in a new tab)
- https://git.kernel.org/stable/c/5bcdf3c18c3471122ee9652b0e2f5cdb718d9a46 (opens in a new tab)
- https://git.kernel.org/stable/c/1fdc4164e488916402badddbb1f51e9380dabb91 (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-2026-115278 (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-2026-99236)Record last updated .