{"id":"CVE-2026-99233","aliases":[],"cve":{"records":[{"id":"CVE-2026-99233","source":"Linux","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-09-25T10:25:14.402Z","published":"2026-11-02T16:06:40.643Z","modified":"2026-11-03T19:13:02.404Z"}],"publishers":[{"name":"Linux","role":"CNA","organizationId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","modified":"2026-11-03T19:13:02.404Z"}],"references":[{"url":"https://git.kernel.org/stable/c/381f543ed35c434d5b707369aa5dcd69ecf440af","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/4472579bd1c83708b6fe623c870cdf728e947205","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/23b4106e8b35823acc79e206c7745f55b9cfd78b","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/06e816bed499fe47f39f12044382cc5d064485fb","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/5597bb8db6855fcb97a67196d227fea359bcd81c","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/cf4e31d5da80fae4c9cdbe7af55b7c3ad213f0e4","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/3403d9bb27ebc3572bd048620746b4414e073bf9","tags":[],"source":"Linux"}],"weaknesses":[],"applicability":[{"source":"Linux","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"6.6.161"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"6.12.115"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"6.18.60"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"7.2.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"7.3.1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"7.4-rc1"}]}]}]}],"prioritization":[]},"title":"tracing/histograms: Verify event_call identity when updating synth_event refcount","titleSource":"Linux","descriptionSource":"Linux","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ntracing/histograms: Verify event_call identity when updating synth_event refcount\n\nIn event_hist_trigger_parse() and hist_unreg_all(), the histogram\nregistration and unregistration paths look up find_synth_event() using\ntrace_event_name(file->event_call) and adjust se->ref if a match is\nfound.\n\nBecause find_synth_event() only compares the event basename, registering\nor removing a histogram on a non-synthetic trace event whose basename\nmatches a synthetic event erroneously modifies the synthetic event's\nreference count.  If a histogram is registered on the non-synthetic\nevent before the synthetic event is created and removed afterwards,\nse->ref is decremented without a matching increment, allowing the\nsynthetic event to be freed while an active histogram action still holds\na pointer to it.\n\nIntroduce find_synth_event_call() to verify that &se->call matches\nfile->event_call before adjusting se->ref.","score":7.8,"severity":"high","published":"2026-11-02T16:06:40.643Z","modified":"2026-11-03T19:13:02.404Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"4b147936fa509650beaf638b331573c23ba4d609","status":"affected","lessThan":"381f543ed35c434d5b707369aa5dcd69ecf440af","versionType":"git"},{"version":"4b147936fa509650beaf638b331573c23ba4d609","status":"affected","lessThan":"4472579bd1c83708b6fe623c870cdf728e947205","versionType":"git"},{"version":"4b147936fa509650beaf638b331573c23ba4d609","status":"affected","lessThan":"23b4106e8b35823acc79e206c7745f55b9cfd78b","versionType":"git"},{"version":"4b147936fa509650beaf638b331573c23ba4d609","status":"affected","lessThan":"06e816bed499fe47f39f12044382cc5d064485fb","versionType":"git"},{"version":"4b147936fa509650beaf638b331573c23ba4d609","status":"affected","lessThan":"5597bb8db6855fcb97a67196d227fea359bcd81c","versionType":"git"},{"version":"4b147936fa509650beaf638b331573c23ba4d609","status":"affected","lessThan":"cf4e31d5da80fae4c9cdbe7af55b7c3ad213f0e4","versionType":"git"},{"version":"4b147936fa509650beaf638b331573c23ba4d609","status":"affected","lessThan":"3403d9bb27ebc3572bd048620746b4414e073bf9","versionType":"git"}],"defaultStatus":"unaffected","cpes":[],"source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-99233"},{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"4.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.17","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.161","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.115","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.60","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.14","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3.1","status":"unaffected","lessThanOrEqual":"7.3.*","versionType":"semver"},{"version":"7.4-rc1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"defaultStatus":"affected","cpes":[],"source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-99233"}],"remediation":[],"references":["https://git.kernel.org/stable/c/381f543ed35c434d5b707369aa5dcd69ecf440af","https://git.kernel.org/stable/c/4472579bd1c83708b6fe623c870cdf728e947205","https://git.kernel.org/stable/c/23b4106e8b35823acc79e206c7745f55b9cfd78b","https://git.kernel.org/stable/c/06e816bed499fe47f39f12044382cc5d064485fb","https://git.kernel.org/stable/c/5597bb8db6855fcb97a67196d227fea359bcd81c","https://git.kernel.org/stable/c/cf4e31d5da80fae4c9cdbe7af55b7c3ad213f0e4","https://git.kernel.org/stable/c/3403d9bb27ebc3572bd048620746b4414e073bf9"],"sources":[{"name":"CVE","id":"CVE-2026-99233","modified":"2026-11-03T19:13:02.404Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-99233"}],"assessments":[{"source":"Linux","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8}],"sourceAffected":[],"observedAt":"2026-11-03T19:50:38.321Z","kev":{"status":"not-listed","checkedAt":"2026-11-06T21:20:33.816Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-11-02T17:15:37.162Z","attemptedAt":"2026-11-02T17:15:37.162Z"},{"source":"GHSA","status":"no-result","checkedAt":"2026-11-02T17:15:37.017Z","attemptedAt":"2026-11-02T17:15:37.017Z"},{"source":"EUVD","status":"available","checkedAt":"2026-11-02T17:15:37.179Z","attemptedAt":"2026-11-02T17:15:37.179Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-11-02T17:15:37.206Z","attemptedAt":"2026-11-02T17:15:37.206Z"}],"evidence":[{"source":"NVD","id":"CVE-2026-99233","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-99233","modified":"2026-11-02T16:17:48.390","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","checkedAt":"2026-11-02T17:15:37.162Z"},{"source":"ENISA EUVD","id":"EUVD-2026-115275","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-115275","modified":"Nov 2, 2026, 4:06:40 PM","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","checkedAt":"2026-11-02T17:15:37.179Z"}],"aiSummary":null}