{"id":"CVE-2026-46270","state":"PUBLISHED","title":"power: supply: rt9455: Fix use-after-free in power_supply_changed()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\npower: supply: rt9455: Fix use-after-free in power_supply_changed()\n\nUsing the `devm_` variant for requesting IRQ _before_ the `devm_`\nvariant for allocating/registering the `power_supply` handle, means that\nthe `power_supply` handle will be deallocated/unregistered _before_ the\ninterrupt handler (since `devm_` naturally deallocates in reverse\nallocation order). This means that during removal, there is a race\ncondition where an interrupt can fire just _after_ the `power_supply`\nhandle has been freed, *but* just _before_ the corresponding\nunregistration of the IRQ handler has run.\n\nThis will lead to the IRQ handler calling `power_supply_changed()` with\na freed `power_supply` handle. Which usually crashes the system or\notherwise silently corrupts the memory...\n\nNote that there is a similar situation which can also happen during\n`probe()`; the possibility of an interrupt firing _before_ registering\nthe `power_supply` handle. This would then lead to the nasty situation\nof using the `power_supply` handle *uninitialized* in\n`power_supply_changed()`.\n\nFix this racy use-after-free by making sure the IRQ is requested _after_\nthe registration of the `power_supply` handle.","publishedAt":"2026-06-03T15:50:12.537Z","updatedAt":"2026-08-05T12:30:54.591Z","severity":{"score":8.4,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"e86d69dd786e94046b8f5be7df1b9a8226a40b2a","status":"affected","lessThan":"d4e2e3c3caa26b93aa9f36d0a6824b584e2a8dfc","versionType":"git"},{"version":"e86d69dd786e94046b8f5be7df1b9a8226a40b2a","status":"affected","lessThan":"62d753b916bd500bb269b7078cdab73198ab4718","versionType":"git"},{"version":"e86d69dd786e94046b8f5be7df1b9a8226a40b2a","status":"affected","lessThan":"a39f8f06216f73ef40e71e2fe4ad071964c1fd36","versionType":"git"},{"version":"e86d69dd786e94046b8f5be7df1b9a8226a40b2a","status":"affected","lessThan":"af261f218a7606f93d2c786353d60bb4feb56ef0","versionType":"git"},{"version":"e86d69dd786e94046b8f5be7df1b9a8226a40b2a","status":"affected","lessThan":"2178dc65d45e2f7bcaa8af8d80d100419bdab251","versionType":"git"},{"version":"e86d69dd786e94046b8f5be7df1b9a8226a40b2a","status":"affected","lessThan":"64e15155095f39f4dec9b4659da1238ef8fc54d4","versionType":"git"},{"version":"e86d69dd786e94046b8f5be7df1b9a8226a40b2a","status":"affected","lessThan":"721449a15170fc5f028a7576d7f65b9f60d53482","versionType":"git"},{"version":"e86d69dd786e94046b8f5be7df1b9a8226a40b2a","status":"affected","lessThan":"e2febe375e5ea5afed92f4cd9711bde8f24ee6d2","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/power/supply/rt9455_charger.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.2","versionType":"semver"},{"version":"5.10.252","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.202","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.165","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.128","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.75","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.14","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.4","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/power/supply/rt9455_charger.c"]}],"references":["https://git.kernel.org/stable/c/d4e2e3c3caa26b93aa9f36d0a6824b584e2a8dfc","https://git.kernel.org/stable/c/62d753b916bd500bb269b7078cdab73198ab4718","https://git.kernel.org/stable/c/a39f8f06216f73ef40e71e2fe4ad071964c1fd36","https://git.kernel.org/stable/c/af261f218a7606f93d2c786353d60bb4feb56ef0","https://git.kernel.org/stable/c/2178dc65d45e2f7bcaa8af8d80d100419bdab251","https://git.kernel.org/stable/c/64e15155095f39f4dec9b4659da1238ef8fc54d4","https://git.kernel.org/stable/c/721449a15170fc5f028a7576d7f65b9f60d53482","https://git.kernel.org/stable/c/e2febe375e5ea5afed92f4cd9711bde8f24ee6d2"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/46xxx/CVE-2026-46270.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-46270","state":"PUBLISHED","datePublished":"2026-06-03T15:50:12.537Z","dateUpdated":"2026-08-05T12:30:54.591Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-13T15:03:33.109Z"},"containers":{"cna":{"title":"power: supply: rt9455: Fix use-after-free in power_supply_changed()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\npower: supply: rt9455: Fix use-after-free in power_supply_changed()\n\nUsing the `devm_` variant for requesting IRQ _before_ the `devm_`\nvariant for allocating/registering the `power_supply` handle, means that\nthe `power_supply` handle will be deallocated/unregistered _before_ the\ninterrupt handler (since `devm_` naturally deallocates in reverse\nallocation order). This means that during removal, there is a race\ncondition where an interrupt can fire just _after_ the `power_supply`\nhandle has been freed, *but* just _before_ the corresponding\nunregistration of the IRQ handler has run.\n\nThis will lead to the IRQ handler calling `power_supply_changed()` with\na freed `power_supply` handle. Which usually crashes the system or\notherwise silently corrupts the memory...\n\nNote that there is a similar situation which can also happen during\n`probe()`; the possibility of an interrupt firing _before_ registering\nthe `power_supply` handle. This would then lead to the nasty situation\nof using the `power_supply` handle *uninitialized* in\n`power_supply_changed()`.\n\nFix this racy use-after-free by making sure the IRQ is requested _after_\nthe registration of the `power_supply` handle."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"e86d69dd786e94046b8f5be7df1b9a8226a40b2a","status":"affected","lessThan":"d4e2e3c3caa26b93aa9f36d0a6824b584e2a8dfc","versionType":"git"},{"version":"e86d69dd786e94046b8f5be7df1b9a8226a40b2a","status":"affected","lessThan":"62d753b916bd500bb269b7078cdab73198ab4718","versionType":"git"},{"version":"e86d69dd786e94046b8f5be7df1b9a8226a40b2a","status":"affected","lessThan":"a39f8f06216f73ef40e71e2fe4ad071964c1fd36","versionType":"git"},{"version":"e86d69dd786e94046b8f5be7df1b9a8226a40b2a","status":"affected","lessThan":"af261f218a7606f93d2c786353d60bb4feb56ef0","versionType":"git"},{"version":"e86d69dd786e94046b8f5be7df1b9a8226a40b2a","status":"affected","lessThan":"2178dc65d45e2f7bcaa8af8d80d100419bdab251","versionType":"git"},{"version":"e86d69dd786e94046b8f5be7df1b9a8226a40b2a","status":"affected","lessThan":"64e15155095f39f4dec9b4659da1238ef8fc54d4","versionType":"git"},{"version":"e86d69dd786e94046b8f5be7df1b9a8226a40b2a","status":"affected","lessThan":"721449a15170fc5f028a7576d7f65b9f60d53482","versionType":"git"},{"version":"e86d69dd786e94046b8f5be7df1b9a8226a40b2a","status":"affected","lessThan":"e2febe375e5ea5afed92f4cd9711bde8f24ee6d2","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/power/supply/rt9455_charger.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.2","versionType":"semver"},{"version":"5.10.252","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.202","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.165","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.128","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.75","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.14","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.4","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/power/supply/rt9455_charger.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/d4e2e3c3caa26b93aa9f36d0a6824b584e2a8dfc"},{"url":"https://git.kernel.org/stable/c/62d753b916bd500bb269b7078cdab73198ab4718"},{"url":"https://git.kernel.org/stable/c/a39f8f06216f73ef40e71e2fe4ad071964c1fd36"},{"url":"https://git.kernel.org/stable/c/af261f218a7606f93d2c786353d60bb4feb56ef0"},{"url":"https://git.kernel.org/stable/c/2178dc65d45e2f7bcaa8af8d80d100419bdab251"},{"url":"https://git.kernel.org/stable/c/64e15155095f39f4dec9b4659da1238ef8fc54d4"},{"url":"https://git.kernel.org/stable/c/721449a15170fc5f028a7576d7f65b9f60d53482"},{"url":"https://git.kernel.org/stable/c/e2febe375e5ea5afed92f4cd9711bde8f24ee6d2"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":8.4,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - Exploitation requires local driver teardown (module unload, sysfs unbind, or shutdown/reboot) that runs `devres_release_all()`; the vulnerable `power_supply_changed()` path is only reachable from the on-chip IRQ handler during that window, not from any network-facing protocol.\nAC:L - An attacker who can initiate driver removal can repeatedly assert charger interrupts (USB plug/unplug, charge events) to hit the narrow race between `power_supply_unregister()` and IRQ release; this is a standard attacker-controlled UAF race, not a layout-dependent condition.\nPR:N - On battery-powered embedded/mobile platforms with this IC, an attacker with brief physical possession can force power-off/reboot (no Linux account or capability) while manipulating the charging port to fire IRQs during devm teardown; explicit unbind/rmmod also works but is not the only path.\nUI:N - No victim interaction is required beyond the attacker’s own physical control of the device and charging port; exploitation does not depend on the victim opening files, mounting filesystems, or approving prompts.\nS:U - Impact is confined to kernel memory corruption and privilege escalation within the kernel security boundary; it does not cross VM, container, or IOMMU isolation boundaries.\nC:H - The IRQ handler calls `power_supply_changed()` on a freed `struct power_supply`, performing spinlock operations and `schedule_work()` on freed heap memory, which is a classic UAF that can be turned into arbitrary kernel memory disclosure.\nI:H - The same UAF writes to freed object fields (`changed`, locks, workqueue) and can be combined with heap grooming for arbitrary kernel writes or control-flow hijack, as noted by the fix author (“silently corrupts the memory”).\nA:H - Use-after-free in interrupt context typically causes immediate kernel oops/panic or silent memory corruption; the commit explicitly states this “usually crashes the system.”"}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-05T12:30:54.591Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"5.10.252"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"5.15.202"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"6.1.165"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"6.6.128"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"6.12.75"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"6.18.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"6.19.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"7.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}