CVE-2026-23274
- Source
- https://cve.org/CVERecord?id=CVE-2026-23274
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-23274.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2026-23274
- Downstream
- Related
- Published
- 2026-03-20T08:08:54.918Z
- Modified
- 2026-04-16T08:44:14.722571634Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- netfilter: xt_IDLETIMER: reject rev0 reuse of ALARM timer labels
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
netfilter: xt_IDLETIMER: reject rev0 reuse of ALARM timer labels
IDLETIMER revision 0 rules reuse existing timers by label and always call mod_timer() on timer->timer.
If the label was created first by revision 1 with XTIDLETIMERALARM, the object uses alarm timer semantics and timer->timer is never initialized. Reusing that object from revision 0 causes modtimer() on an uninitialized timerlist, triggering debugobjects warnings and possible panic when paniconwarn=1.
Fix this by rejecting revision 0 rule insertion when an existing timer with the same label is of ALARM type.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23274.json", "cna_assigner": "Linux" }- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/28c7cfaf0c0ab17cbd7754092116fd1af45271f9
- https://git.kernel.org/stable/c/329f0b9b48ee6ab59d1ab72fef55fe8c6463a6cf
- https://git.kernel.org/stable/c/54080355999381fed4a26129579a5765bab87491
- https://git.kernel.org/stable/c/5e7ece24c5cb75a60402aad4d803c7898ea40aa9
- https://git.kernel.org/stable/c/f228b9ae2a7e84d1153616d8e71c4236cb1f1309
- https://git.kernel.org/stable/c/f5ef97c13165542480a6ffdbe6f09f40bbb7cbf1
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23274.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-23274
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced68983a354a655c35d3fb204489d383a2a051fda7Fixed28c7cfaf0c0ab17cbd7754092116fd1af45271f9Fixed54080355999381fed4a26129579a5765bab87491Fixed5e7ece24c5cb75a60402aad4d803c7898ea40aa9Fixedf5ef97c13165542480a6ffdbe6f09f40bbb7cbf1Fixedf228b9ae2a7e84d1153616d8e71c4236cb1f1309Fixed329f0b9b48ee6ab59d1ab72fef55fe8c6463a6cf