Baitaphish
Security intelligence
SearchLatest briefing
CVE Explorer

CVE-2026-23405

In the Linux kernel, the following vulnerability has been resolved: apparmor: fix: limit the number of levels of policy namespaces Currently the number of policy namespaces is not bounded relying on the user namespace limit. However policy namespaces aren't strictly tied to user namespaces and it is possible to create them and nest them arbitrarily deep which can be used to exhaust system resource. Hard cap policy namespaces to the same depth as user namespaces.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:43197352b1e96475b975197a192f8702a000cf19ed608e72b073ada62ab321b9
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"defaultStatus":"affected","product":"Linux","programFiles":["security/apparmor/include/policy_ns.h","security/apparmor/policy_ns.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.36"},{"lessThan":"2.6.36","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.253","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.203","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b2eb6b5ee5aced8fad089304891f0707f505bb66ddfa35403032c21744991f4f · sha256:2c26d6540b07d1f4… · /containers/cna/affected/1

{"defaultStatus":"unaffected","product":"Linux","programFiles":["security/apparmor/include/policy_ns.h","security/apparmor/policy_ns.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"6b396cc2f0365e684fc1d3547d18ef79fcee225d","status":"affected","version":"c88d4c7b049e87998ac0a9f455aa545cc895ef92","versionType":"git"},{"lessThan":"87d0cecc900e55d55fc4dbfb43ac93e269c7a5b3","status":"affected","version":"c88d4c7b049e87998ac0a9f455aa545cc895ef92","versionType":"git"},{"lessThan":"b1226e37eb3754d389721c135db6107db94c7a72","status…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b2eb6b5ee5aced8fad089304891f0707f505bb66ddfa35403032c21744991f4f · sha256:2c26d6540b07d1f4… · /containers/cna/affected/0

Affected products and versions

2 source assertions
{"defaultStatus":"affected","product":"Linux","programFiles":["security/apparmor/include/policy_ns.h","security/apparmor/policy_ns.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.36"},{"lessThan":"2.6.36","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.253","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.203","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b2eb6b5ee5aced8fad089304891f0707f505bb66ddfa35403032c21744991f4f · sha256:2c26d6540b07d1f4… · /containers/cna/affected/1
{"defaultStatus":"unaffected","product":"Linux","programFiles":["security/apparmor/include/policy_ns.h","security/apparmor/policy_ns.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"6b396cc2f0365e684fc1d3547d18ef79fcee225d","status":"affected","version":"c88d4c7b049e87998ac0a9f455aa545cc895ef92","versionType":"git"},{"lessThan":"87d0cecc900e55d55fc4dbfb43ac93e269c7a5b3","status":"affected","version":"c88d4c7b049e87998ac0a9f455aa545cc895ef92","versionType":"git"},{"lessThan":"b1226e37eb3754d389721c135db6107db94c7a72","status…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b2eb6b5ee5aced8fad089304891f0707f505bb66ddfa35403032c21744991f4f · sha256:2c26d6540b07d1f4… · /containers/cna/affected/0

Source references

8 source assertions
{"url":"https://git.kernel.org/stable/c/306039414932c80f8420695a24d4fe10c84ccfb2"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b2eb6b5ee5aced8fad089304891f0707f505bb66ddfa35403032c21744991f4f · sha256:2c26d6540b07d1f4… · /containers/cna/references/7
{"url":"https://git.kernel.org/stable/c/3f8699b3ee0c04b4b9bc27b82cd89a40e81e1d2e"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b2eb6b5ee5aced8fad089304891f0707f505bb66ddfa35403032c21744991f4f · sha256:2c26d6540b07d1f4… · /containers/cna/references/3
{"url":"https://git.kernel.org/stable/c/6b396cc2f0365e684fc1d3547d18ef79fcee225d"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b2eb6b5ee5aced8fad089304891f0707f505bb66ddfa35403032c21744991f4f · sha256:2c26d6540b07d1f4… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/7b6495ead2c611647f6b11441a852324e3eb8616"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b2eb6b5ee5aced8fad089304891f0707f505bb66ddfa35403032c21744991f4f · sha256:2c26d6540b07d1f4… · /containers/cna/references/6
{"url":"https://git.kernel.org/stable/c/853ce31ca72097d23991a06876a2ccb5cb64b603"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b2eb6b5ee5aced8fad089304891f0707f505bb66ddfa35403032c21744991f4f · sha256:2c26d6540b07d1f4… · /containers/cna/references/4
{"url":"https://git.kernel.org/stable/c/87d0cecc900e55d55fc4dbfb43ac93e269c7a5b3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b2eb6b5ee5aced8fad089304891f0707f505bb66ddfa35403032c21744991f4f · sha256:2c26d6540b07d1f4… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/b1226e37eb3754d389721c135db6107db94c7a72"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b2eb6b5ee5aced8fad089304891f0707f505bb66ddfa35403032c21744991f4f · sha256:2c26d6540b07d1f4… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/d42b2b6bb77ca40ee34ab74ad79305840b5f315d"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b2eb6b5ee5aced8fad089304891f0707f505bb66ddfa35403032c21744991f4f · sha256:2c26d6540b07d1f4… · /containers/cna/references/5

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

← Back to CVE Explorer