{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-46270", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.109Z", "datePublished": "2026-06-03T15:50:12.537Z", "dateUpdated": "2026-08-05T12:30:54.591Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:30:54.591Z" }, "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." } ], "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.”" } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/power/supply/rt9455_charger.c" ], "versions": [ { "version": "e86d69dd786e94046b8f5be7df1b9a8226a40b2a", "lessThan": "d4e2e3c3caa26b93aa9f36d0a6824b584e2a8dfc", "status": "affected", "versionType": "git" }, { "version": "e86d69dd786e94046b8f5be7df1b9a8226a40b2a", "lessThan": "62d753b916bd500bb269b7078cdab73198ab4718", "status": "affected", "versionType": "git" }, { "version": "e86d69dd786e94046b8f5be7df1b9a8226a40b2a", "lessThan": "a39f8f06216f73ef40e71e2fe4ad071964c1fd36", "status": "affected", "versionType": "git" }, { "version": "e86d69dd786e94046b8f5be7df1b9a8226a40b2a", "lessThan": "af261f218a7606f93d2c786353d60bb4feb56ef0", "status": "affected", "versionType": "git" }, { "version": "e86d69dd786e94046b8f5be7df1b9a8226a40b2a", "lessThan": "2178dc65d45e2f7bcaa8af8d80d100419bdab251", "status": "affected", "versionType": "git" }, { "version": "e86d69dd786e94046b8f5be7df1b9a8226a40b2a", "lessThan": "64e15155095f39f4dec9b4659da1238ef8fc54d4", "status": "affected", "versionType": "git" }, { "version": "e86d69dd786e94046b8f5be7df1b9a8226a40b2a", "lessThan": "721449a15170fc5f028a7576d7f65b9f60d53482", "status": "affected", "versionType": "git" }, { "version": "e86d69dd786e94046b8f5be7df1b9a8226a40b2a", "lessThan": "e2febe375e5ea5afed92f4cd9711bde8f24ee6d2", "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/power/supply/rt9455_charger.c" ], "versions": [ { "version": "4.2", "status": "affected" }, { "version": "0", "lessThan": "4.2", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.252", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.202", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.165", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.128", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.75", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.14", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.19.4", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0", "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": "4.2", "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" } ] } ] } ], "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" } ], "title": "power: supply: rt9455: Fix use-after-free in power_supply_changed()", "x_generator": { "engine": "bippy-1.2.0" } } } }