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CVE-2026-23406

In the Linux kernel, the following vulnerability has been resolved: apparmor: fix side-effect bug in match_char() macro usage The match_char() macro evaluates its character parameter multiple times when traversing differential encoding chains. When invoked with *str++, the string pointer advances on each iteration of the inner do-while loop, causing the DFA to check different characters at each iteration and therefore skip input characters. This results in out-of-bounds reads when the pointer
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:6777f8b7d9c79a8271f520c421f4a8617bb2529a3ffb330645642f803326e314
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/match.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.17"},{"lessThan":"4.17","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","version":"6.1.169","versionType":"semver"},{"les…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ee4cd521d4d4a6625f75b70a9f8ba392a678bc5f5a887eaa2132f74af3582124 · sha256:3b353b6f24137071… · /containers/cna/affected/1

{"defaultStatus":"unaffected","product":"Linux","programFiles":["security/apparmor/match.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"c7dc56d8b37eda1396feeec3ab1c7ecee5eae31b","status":"affected","version":"074c1cd798cb0b481d7eaa749b64aa416563c053","versionType":"git"},{"lessThan":"f16f2e5936c0f5f0d11fdf10d2be3e47e7108e42","status":"affected","version":"074c1cd798cb0b481d7eaa749b64aa416563c053","versionType":"git"},{"lessThan":"1fc94f16098213d01e56c97feed9b3ecf0147a37","status":"affected","version":"074c1cd798cb0b481d7e…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ee4cd521d4d4a6625f75b70a9f8ba392a678bc5f5a887eaa2132f74af3582124 · sha256:3b353b6f24137071… · /containers/cna/affected/0

Affected products and versions

2 source assertions
{"defaultStatus":"affected","product":"Linux","programFiles":["security/apparmor/match.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.17"},{"lessThan":"4.17","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","version":"6.1.169","versionType":"semver"},{"les…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ee4cd521d4d4a6625f75b70a9f8ba392a678bc5f5a887eaa2132f74af3582124 · sha256:3b353b6f24137071… · /containers/cna/affected/1
{"defaultStatus":"unaffected","product":"Linux","programFiles":["security/apparmor/match.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"c7dc56d8b37eda1396feeec3ab1c7ecee5eae31b","status":"affected","version":"074c1cd798cb0b481d7eaa749b64aa416563c053","versionType":"git"},{"lessThan":"f16f2e5936c0f5f0d11fdf10d2be3e47e7108e42","status":"affected","version":"074c1cd798cb0b481d7eaa749b64aa416563c053","versionType":"git"},{"lessThan":"1fc94f16098213d01e56c97feed9b3ecf0147a37","status":"affected","version":"074c1cd798cb0b481d7e…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ee4cd521d4d4a6625f75b70a9f8ba392a678bc5f5a887eaa2132f74af3582124 · sha256:3b353b6f24137071… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:ee4cd521d4d4a6625f75b70a9f8ba392a678bc5f5a887eaa2132f74af3582124 · sha256:3b353b6f24137071… · /containers/cna/metrics/0/cvssV3_1

Source references

8 source assertions
{"url":"https://git.kernel.org/stable/c/0510d1ba0976f97f521feb2b75b0572ea5df3ceb"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ee4cd521d4d4a6625f75b70a9f8ba392a678bc5f5a887eaa2132f74af3582124 · sha256:3b353b6f24137071… · /containers/cna/references/5
{"url":"https://git.kernel.org/stable/c/1fc94f16098213d01e56c97feed9b3ecf0147a37"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ee4cd521d4d4a6625f75b70a9f8ba392a678bc5f5a887eaa2132f74af3582124 · sha256:3b353b6f24137071… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/383b7270faf42564f133134c2fc3c24bbae52615"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ee4cd521d4d4a6625f75b70a9f8ba392a678bc5f5a887eaa2132f74af3582124 · sha256:3b353b6f24137071… · /containers/cna/references/6
{"url":"https://git.kernel.org/stable/c/5a184f7cbdeaad17e16dedf3c17d0cd622edfed8"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ee4cd521d4d4a6625f75b70a9f8ba392a678bc5f5a887eaa2132f74af3582124 · sha256:3b353b6f24137071… · /containers/cna/references/3
{"url":"https://git.kernel.org/stable/c/8756b68edae37ff546c02091989a4ceab3f20abd"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ee4cd521d4d4a6625f75b70a9f8ba392a678bc5f5a887eaa2132f74af3582124 · sha256:3b353b6f24137071… · /containers/cna/references/7
{"url":"https://git.kernel.org/stable/c/b73c1dff8a9d7eeaebabf8097a5b2de192f40913"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ee4cd521d4d4a6625f75b70a9f8ba392a678bc5f5a887eaa2132f74af3582124 · sha256:3b353b6f24137071… · /containers/cna/references/4
{"url":"https://git.kernel.org/stable/c/c7dc56d8b37eda1396feeec3ab1c7ecee5eae31b"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ee4cd521d4d4a6625f75b70a9f8ba392a678bc5f5a887eaa2132f74af3582124 · sha256:3b353b6f24137071… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/f16f2e5936c0f5f0d11fdf10d2be3e47e7108e42"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ee4cd521d4d4a6625f75b70a9f8ba392a678bc5f5a887eaa2132f74af3582124 · sha256:3b353b6f24137071… · /containers/cna/references/1

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.

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