{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-53651","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-10-07T15:16:59.660Z","datePublished":"2025-10-07T15:19:47.832Z","dateUpdated":"2026-08-05T09:15:22.206Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-05T09:15:22.206Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nInput: exc3000 - properly stop timer on shutdown\n\nWe need to stop the timer on driver unbind or probe failures, otherwise\nwe get UAF/Oops."}],"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"},"scenarios":[{"lang":"en","value":"AV:L - The free is triggered by a local operation — driver unbind via sysfs, module unload, or a bind-induced probe failure — and the arming side is a local I2C touch controller; there is no network-reachable path to this driver.\nAC:L - The 100ms timer window can be attacked repeatedly by looping bind/unbind while the controller emits error frames, and the probe-failure variant leaves the timer armed deterministically during the multi-second vendor-query retry loop, so the attacker drives both sides of the race.\nPR:L - An unprivileged local user can reach the vulnerable object through the world-readable fw_version/model/type sysfs attributes that drive I2C vendor requests and touch-frame handling; consistent with kernel CNA precedent, driver unbind/remove UAFs of this class are scored at low privilege rather than root.\nUI:N - No victim action is required — the attacker performs the unbind/rebind itself, and the probe-failure variant fires autonomously when the controller misbehaves.\nS:U - The use-after-free is contained within the kernel's own security authority with no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - The freed slab object is reallocatable, and the timer callback reads `data->input` and MT slot state out of freed memory, while `expire_timers()` reads the call target from it — giving a path to disclose arbitrary kernel memory.\nI:H - `fn = timer->function` is loaded from the freed object and immediately called, and `detach_timer()` performs hlist pointer writes through it, yielding a controlled indirect call and write primitive suitable for privilege escalation.\nA:H - Even unexploited, the dangling timer dereferences freed memory 100ms after unbind or probe failure, producing the UAF/Oops reported in the commit message and crashing the kernel."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/input/touchscreen/exc3000.c"],"versions":[{"version":"7e577a17f2eefeef32f1106ebf91e7cd143ba654","lessThan":"526a177ac6353d65057eadb5d6edafc168f64484","status":"affected","versionType":"git"},{"version":"7e577a17f2eefeef32f1106ebf91e7cd143ba654","lessThan":"bee57c20fc0ca5ef9b9a53a0335eab2ac9e9cae1","status":"affected","versionType":"git"},{"version":"7e577a17f2eefeef32f1106ebf91e7cd143ba654","lessThan":"79c81d137d36f9635bbcbc3916c0cccb418a61dd","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/input/touchscreen/exc3000.c"],"versions":[{"version":"4.15","status":"affected"},{"version":"0","lessThan":"4.15","status":"unaffected","versionType":"semver"},{"version":"6.1.20","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.2.3","lessThanOrEqual":"6.2.*","status":"unaffected","versionType":"semver"},{"version":"6.3","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":"4.15","versionEndExcluding":"6.1.20"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"6.2.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"6.3"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/526a177ac6353d65057eadb5d6edafc168f64484"},{"url":"https://git.kernel.org/stable/c/bee57c20fc0ca5ef9b9a53a0335eab2ac9e9cae1"},{"url":"https://git.kernel.org/stable/c/79c81d137d36f9635bbcbc3916c0cccb418a61dd"}],"title":"Input: exc3000 - properly stop timer on shutdown","x_generator":{"engine":"bippy-1.2.0"}}}}