{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-23336", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-01-13T15:37:45.997Z", "datePublished": "2026-03-25T10:27:26.061Z", "dateUpdated": "2026-08-05T12:21:13.568Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:21:13.568Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: cfg80211: cancel rfkill_block work in wiphy_unregister()\n\nThere is a use-after-free error in cfg80211_shutdown_all_interfaces found\nby syzkaller:\n\nBUG: KASAN: use-after-free in cfg80211_shutdown_all_interfaces+0x213/0x220\nRead of size 8 at addr ffff888112a78d98 by task kworker/0:5/5326\nCPU: 0 UID: 0 PID: 5326 Comm: kworker/0:5 Not tainted 6.19.0-rc2 #2 PREEMPT(voluntary)\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014\nWorkqueue: events cfg80211_rfkill_block_work\nCall Trace:\n \n dump_stack_lvl+0x116/0x1f0\n print_report+0xcd/0x630\n kasan_report+0xe0/0x110\n cfg80211_shutdown_all_interfaces+0x213/0x220\n cfg80211_rfkill_block_work+0x1e/0x30\n process_one_work+0x9cf/0x1b70\n worker_thread+0x6c8/0xf10\n kthread+0x3c5/0x780\n ret_from_fork+0x56d/0x700\n ret_from_fork_asm+0x1a/0x30\n \n\nThe problem arises due to the rfkill_block work is not cancelled when wiphy\nis being unregistered. In order to fix the issue cancel the corresponding\nwork in wiphy_unregister().\n\nFound by Linux Verification Center (linuxtesting.org) with Syzkaller." } ], "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 vulnerability is triggered through WiFi driver device lifecycle operations (device registration/removal and rfkill state changes), requiring local system access. Not remotely reachable through WiFi frames — it's a driver management race condition.\nAC:L - The attacker controls both sides of the race — device insertion triggers rfkill hardware state changes, and device removal triggers wiphy_unregister(). A crafted USB WiFi device can reliably trigger both events in the needed sequence.\nPR:L - A local user with access to USB ports or device management interfaces can trigger device attachment/removal. No root/CAP_NET_ADMIN is needed to plug in a USB WiFi device on shared workstations.\nUI:N - No user interaction is required; the attacker triggers both the rfkill state change and the device unregistration autonomously.\nS:U - Standard kernel vulnerability — the impact remains within the same security authority (kernel space). No VM escape or sandbox boundary crossing.\nC:H - This is a use-after-free where the attacker can control freed heap contents through heap spraying, enabling arbitrary memory reads via the freed rdev structure.\nI:H - The UAF accesses freed memory that iterates a list and calls dev_close() on network devices. With heap spray, the attacker can redirect function pointers for arbitrary code execution in kernel context.\nA:H - The kernel crash is confirmed by the KASAN report showing a use-after-free read in cfg80211_shutdown_all_interfaces. Any UAF reliably causes kernel oops/panic." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/wireless/core.c" ], "versions": [ { "version": "1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3", "lessThan": "82a35356b5c1f75fe6a8a561db44e8d0e49da8f9", "status": "affected", "versionType": "git" }, { "version": "1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3", "lessThan": "b2e9626a9d16b9bbbd06498c9e73c93be354dc7a", "status": "affected", "versionType": "git" }, { "version": "1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3", "lessThan": "eeea8da43ab86ac0a6b9cec225eec91564346940", "status": "affected", "versionType": "git" }, { "version": "1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3", "lessThan": "fa18639deab4a3662d543200c5bfc29bf4e23173", "status": "affected", "versionType": "git" }, { "version": "1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3", "lessThan": "57e39fe8da573435fa35975f414f4dc17d9f8449", "status": "affected", "versionType": "git" }, { "version": "1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3", "lessThan": "584279ad9ff1e8e7c5494b9fce286201f7d1f9e2", "status": "affected", "versionType": "git" }, { "version": "1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3", "lessThan": "cd2f52944c7b95dcdfe0d87f385a2d96458a3ae5", "status": "affected", "versionType": "git" }, { "version": "1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3", "lessThan": "767d23ade706d5fa51c36168e92a9c5533c351a1", "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/wireless/core.c" ], "versions": [ { "version": "2.6.31", "status": "affected" }, { "version": "0", "lessThan": "2.6.31", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.253", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.203", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.167", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.130", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.77", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.17", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.19.7", "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": "2.6.31", "versionEndExcluding": "5.10.253" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.31", "versionEndExcluding": "5.15.203" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.31", "versionEndExcluding": "6.1.167" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.31", "versionEndExcluding": "6.6.130" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.31", "versionEndExcluding": "6.12.77" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.31", "versionEndExcluding": "6.18.17" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.31", "versionEndExcluding": "6.19.7" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.31", "versionEndExcluding": "7.0" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/82a35356b5c1f75fe6a8a561db44e8d0e49da8f9" }, { "url": "https://git.kernel.org/stable/c/b2e9626a9d16b9bbbd06498c9e73c93be354dc7a" }, { "url": "https://git.kernel.org/stable/c/eeea8da43ab86ac0a6b9cec225eec91564346940" }, { "url": "https://git.kernel.org/stable/c/fa18639deab4a3662d543200c5bfc29bf4e23173" }, { "url": "https://git.kernel.org/stable/c/57e39fe8da573435fa35975f414f4dc17d9f8449" }, { "url": "https://git.kernel.org/stable/c/584279ad9ff1e8e7c5494b9fce286201f7d1f9e2" }, { "url": "https://git.kernel.org/stable/c/cd2f52944c7b95dcdfe0d87f385a2d96458a3ae5" }, { "url": "https://git.kernel.org/stable/c/767d23ade706d5fa51c36168e92a9c5533c351a1" } ], "title": "wifi: cfg80211: cancel rfkill_block work in wiphy_unregister()", "x_generator": { "engine": "bippy-1.2.0" } } } }