CVE-2026-99236
tracing: Reject incomplete event filter expressions
- Published
- Updated
- Reserved
- Assigned by
- Linux
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.
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)
- Not scored
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
Linux · Linux
- affected 80765597bc587feae8dbc8ce97a0f32e12a6e625 – < 4a1a6d35359991c5d47f4bf101cfbe1475c94093
- affected 80765597bc587feae8dbc8ce97a0f32e12a6e625 – < 2a98f5d4913ec081e08e1075512cb7ec313d9f72
- affected 80765597bc587feae8dbc8ce97a0f32e12a6e625 – < 15ff3cc7f2beecc3f95d66358f20ad7b057466aa
- affected 80765597bc587feae8dbc8ce97a0f32e12a6e625 – < b205ff58e02922ac324f931cf9eb238a3acdb048
- affected 80765597bc587feae8dbc8ce97a0f32e12a6e625 – < 5a999b5a16530898f0dbe5f8c50fd45ea72e110b
- affected 80765597bc587feae8dbc8ce97a0f32e12a6e625 – < 1008e9e0b8280d47f1ab5e9c113f666a023a9697
- affected 80765597bc587feae8dbc8ce97a0f32e12a6e625 – < 64993d970dde2a2da353e9e99595a4fa88ec27d9
- affected 80765597bc587feae8dbc8ce97a0f32e12a6e625 – < 5bcdf3c18c3471122ee9652b0e2f5cdb718d9a46
Linux · Linux
- 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.*
References (8)
- 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)
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)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Record last updated .