Vulnerability-Lookup

FKIE_CVE-2026-23274

Vulnerability from fkie_nvd - Published: 2026-03-20 09:16 - Updated: 2026-05-22 18:17

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

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 XT_IDLETIMER_ALARM, the object uses alarm timer semantics and timer->timer is never initialized. Reusing that object from revision 0 causes mod_timer() on an uninitialized timer_list, triggering debugobjects warnings and possible panic when panic_on_warn=1. Fix this by rejecting revision 0 rule insertion when an existing timer with the same label is of ALARM type.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/144f88054ba0180467356f40895bd660b5dceeec	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/28c7cfaf0c0ab17cbd7754092116fd1af45271f9	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/329f0b9b48ee6ab59d1ab72fef55fe8c6463a6cf	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/32e937dc6e97f5ed3cdfe3fc0b2b19a05e23fa44	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/54080355999381fed4a26129579a5765bab87491	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5e7ece24c5cb75a60402aad4d803c7898ea40aa9	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f228b9ae2a7e84d1153616d8e71c4236cb1f1309	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f5ef97c13165542480a6ffdbe6f09f40bbb7cbf1	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0

JSON

To clipboard

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}

CVE-2026-23274 (GCVE-0-2026-23274)

Vulnerability from cvelistv5 – Published: 2026-03-20 08:08 – Updated: 2026-05-11 22:03

Title

netfilter: xt_IDLETIMER: reject rev0 reuse of ALARM timer labels

Summary

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/32e937dc6e97f5ed3…
https://git.kernel.org/stable/c/144f88054ba018046…
https://git.kernel.org/stable/c/28c7cfaf0c0ab17cb…
https://git.kernel.org/stable/c/54080355999381fed…
https://git.kernel.org/stable/c/5e7ece24c5cb75a60…
https://git.kernel.org/stable/c/f5ef97c1316554248…
https://git.kernel.org/stable/c/f228b9ae2a7e84d11…
https://git.kernel.org/stable/c/329f0b9b48ee6ab59…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 68983a354a655c35d3fb204489d383a2a051fda7 , < 32e937dc6e97f5ed3cdfe3fc0b2b19a05e23fa44 (git) Affected: 68983a354a655c35d3fb204489d383a2a051fda7 , < 144f88054ba0180467356f40895bd660b5dceeec (git) Affected: 68983a354a655c35d3fb204489d383a2a051fda7 , < 28c7cfaf0c0ab17cbd7754092116fd1af45271f9 (git) Affected: 68983a354a655c35d3fb204489d383a2a051fda7 , < 54080355999381fed4a26129579a5765bab87491 (git) Affected: 68983a354a655c35d3fb204489d383a2a051fda7 , < 5e7ece24c5cb75a60402aad4d803c7898ea40aa9 (git) Affected: 68983a354a655c35d3fb204489d383a2a051fda7 , < f5ef97c13165542480a6ffdbe6f09f40bbb7cbf1 (git) Affected: 68983a354a655c35d3fb204489d383a2a051fda7 , < f228b9ae2a7e84d1153616d8e71c4236cb1f1309 (git) Affected: 68983a354a655c35d3fb204489d383a2a051fda7 , < 329f0b9b48ee6ab59d1ab72fef55fe8c6463a6cf (git)
Linux	Linux	Affected: 5.7 Unaffected: 0 , < 5.7 (semver) Unaffected: 5.10.253 , ≤ 5.10.* (semver) Unaffected: 5.15.203 , ≤ 5.15.* (semver) Unaffected: 6.1.167 , ≤ 6.1.* (semver) Unaffected: 6.6.130 , ≤ 6.6.* (semver) Unaffected: 6.12.78 , ≤ 6.12.* (semver) Unaffected: 6.18.19 , ≤ 6.18.* (semver) Unaffected: 6.19.9 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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{
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          "product": "Linux",
          "programFiles": [
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    "dateReserved": "2026-01-13T15:37:45.991Z",
    "dateUpdated": "2026-05-11T22:03:41.745Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2026-23274

CVE-2026-23274 (GCVE-0-2026-23274)

Tags

Sightings

Nomenclature