{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23105","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-01-13T15:37:45.966Z","datePublished":"2026-02-04T16:08:26.376Z","dateUpdated":"2026-05-11T22:00:13.122Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T22:00:13.122Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: qfq: Use cl_is_active to determine whether class is active in qfq_rm_from_ag\n\nThis is more of a preventive patch to make the code more consistent and\nto prevent possible exploits that employ child qlen manipulations on qfq.\nuse cl_is_active instead of relying on the child qdisc's qlen to determine\nclass activation."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"}}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sched/sch_qfq.c"],"versions":[{"version":"462dbc9101acd38e92eda93c0726857517a24bbd","lessThan":"fac2c67bb2bb732eae4283e45fc338af7e08c254","status":"affected","versionType":"git"},{"version":"462dbc9101acd38e92eda93c0726857517a24bbd","lessThan":"b8c24cf5268fb3bfb8d16324c3dbb985f698c835","status":"affected","versionType":"git"},{"version":"462dbc9101acd38e92eda93c0726857517a24bbd","lessThan":"f27047abf7cac1b6f90c3ad60de21ef9f717c26d","status":"affected","versionType":"git"},{"version":"462dbc9101acd38e92eda93c0726857517a24bbd","lessThan":"93b8635974fb050c43d07e35e5edfe6e685ca28a","status":"affected","versionType":"git"},{"version":"462dbc9101acd38e92eda93c0726857517a24bbd","lessThan":"abd9fc26ea577561a5ef6241a1b058755ffdad0c","status":"affected","versionType":"git"},{"version":"462dbc9101acd38e92eda93c0726857517a24bbd","lessThan":"77f1afd0bb4d5da95236f6114e6d0dfcde187ff6","status":"affected","versionType":"git"},{"version":"462dbc9101acd38e92eda93c0726857517a24bbd","lessThan":"d837fbee92453fbb829f950c8e7cf76207d73f33","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sched/sch_qfq.c"],"versions":[{"version":"3.8","status":"affected"},{"version":"0","lessThan":"3.8","status":"unaffected","versionType":"semver"},{"version":"5.10.249","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.199","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.162","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.122","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.68","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.8","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"5.10.249"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"5.15.199"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"6.1.162"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"6.6.122"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"6.12.68"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"6.18.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"6.19"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/fac2c67bb2bb732eae4283e45fc338af7e08c254"},{"url":"https://git.kernel.org/stable/c/b8c24cf5268fb3bfb8d16324c3dbb985f698c835"},{"url":"https://git.kernel.org/stable/c/f27047abf7cac1b6f90c3ad60de21ef9f717c26d"},{"url":"https://git.kernel.org/stable/c/93b8635974fb050c43d07e35e5edfe6e685ca28a"},{"url":"https://git.kernel.org/stable/c/abd9fc26ea577561a5ef6241a1b058755ffdad0c"},{"url":"https://git.kernel.org/stable/c/77f1afd0bb4d5da95236f6114e6d0dfcde187ff6"},{"url":"https://git.kernel.org/stable/c/d837fbee92453fbb829f950c8e7cf76207d73f33"}],"title":"net/sched: qfq: Use cl_is_active to determine whether class is active in qfq_rm_from_ag","x_generator":{"engine":"bippy-1.2.0"}}}}