{"id":"CVE-2024-26898","state":"PUBLISHED","title":"aoe: fix the potential use-after-free problem in aoecmd_cfg_pkts","description":"In the Linux kernel, the following vulnerability has been resolved:\n\naoe: fix the potential use-after-free problem in aoecmd_cfg_pkts\n\nThis patch is against CVE-2023-6270. The description of cve is:\n\n  A flaw was found in the ATA over Ethernet (AoE) driver in the Linux\n  kernel. The aoecmd_cfg_pkts() function improperly updates the refcnt on\n  `struct net_device`, and a use-after-free can be triggered by racing\n  between the free on the struct and the access through the `skbtxq`\n  global queue. This could lead to a denial of service condition or\n  potential code execution.\n\nIn aoecmd_cfg_pkts(), it always calls dev_put(ifp) when skb initial\ncode is finished. But the net_device ifp will still be used in\nlater tx()->dev_queue_xmit() in kthread. Which means that the\ndev_put(ifp) should NOT be called in the success path of skb\ninitial code in aoecmd_cfg_pkts(). Otherwise tx() may run into\nuse-after-free because the net_device is freed.\n\nThis patch removed the dev_put(ifp) in the success path in\naoecmd_cfg_pkts(), and added dev_put() after skb xmit in tx().","publishedAt":"2024-04-17T10:27:48.466Z","updatedAt":"2026-10-15T00:39:15.702Z","severity":{"score":7.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/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":"7562f876cd93800f2f8c89445f2a563590b24e09","status":"affected","lessThan":"ad80c34944d7175fa1f5c7a55066020002921a99","versionType":"git"},{"version":"7562f876cd93800f2f8c89445f2a563590b24e09","status":"affected","lessThan":"1a54aa506b3b2f31496731039e49778f54eee881","versionType":"git"},{"version":"7562f876cd93800f2f8c89445f2a563590b24e09","status":"affected","lessThan":"faf0b4c5e00bb680e8e43ac936df24d3f48c8e65","versionType":"git"},{"version":"7562f876cd93800f2f8c89445f2a563590b24e09","status":"affected","lessThan":"7dd09fa80b0765ce68bfae92f4e2f395ccf0fba4","versionType":"git"},{"version":"7562f876cd93800f2f8c89445f2a563590b24e09","status":"affected","lessThan":"74ca3ef68d2f449bc848c0a814cefc487bf755fa","versionType":"git"},{"version":"7562f876cd93800f2f8c89445f2a563590b24e09","status":"affected","lessThan":"eb48680b0255a9e8a9bdc93d6a55b11c31262e62","versionType":"git"},{"version":"7562f876cd93800f2f8c89445f2a563590b24e09","status":"affected","lessThan":"079cba4f4e307c69878226fdf5228c20aa1c969c","versionType":"git"},{"version":"7562f876cd93800f2f8c89445f2a563590b24e09","status":"affected","lessThan":"a16fbb80064634b254520a46395e36b87ca4731e","versionType":"git"},{"version":"7562f876cd93800f2f8c89445f2a563590b24e09","status":"affected","lessThan":"f98364e926626c678fb4b9004b75cacf92ff0662","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/block/aoe/aoecmd.c","drivers/block/aoe/aoenet.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.22","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.22","versionType":"semver"},{"version":"4.19.311","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.273","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.214","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.153","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.83","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.23","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.7.11","status":"unaffected","lessThanOrEqual":"6.7.*","versionType":"semver"},{"version":"6.8.2","status":"unaffected","lessThanOrEqual":"6.8.*","versionType":"semver"},{"version":"6.9","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/block/aoe/aoecmd.c","drivers/block/aoe/aoenet.c"]}],"references":["https://git.kernel.org/stable/c/ad80c34944d7175fa1f5c7a55066020002921a99","https://git.kernel.org/stable/c/1a54aa506b3b2f31496731039e49778f54eee881","https://git.kernel.org/stable/c/faf0b4c5e00bb680e8e43ac936df24d3f48c8e65","https://git.kernel.org/stable/c/7dd09fa80b0765ce68bfae92f4e2f395ccf0fba4","https://git.kernel.org/stable/c/74ca3ef68d2f449bc848c0a814cefc487bf755fa","https://git.kernel.org/stable/c/eb48680b0255a9e8a9bdc93d6a55b11c31262e62","https://git.kernel.org/stable/c/079cba4f4e307c69878226fdf5228c20aa1c969c","https://git.kernel.org/stable/c/a16fbb80064634b254520a46395e36b87ca4731e","https://git.kernel.org/stable/c/f98364e926626c678fb4b9004b75cacf92ff0662","https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html","https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html","https://cert-portal.siemens.com/productcert/html/ssa-398330.html","https://cert-portal.siemens.com/productcert/html/ssa-265688.html"],"weaknesses":["CWE-416"],"ingestedAt":"2026-10-29T20:07:10.607Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2024/26xxx/CVE-2024-26898.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-26898","state":"PUBLISHED","datePublished":"2024-04-17T10:27:48.466Z","dateUpdated":"2026-10-15T00:39:15.702Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-02-19T14:20:24.186Z"},"containers":{"cna":{"title":"aoe: fix the potential use-after-free problem in aoecmd_cfg_pkts","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\naoe: fix the potential use-after-free problem in aoecmd_cfg_pkts\n\nThis patch is against CVE-2023-6270. The description of cve is:\n\n  A flaw was found in the ATA over Ethernet (AoE) driver in the Linux\n  kernel. The aoecmd_cfg_pkts() function improperly updates the refcnt on\n  `struct net_device`, and a use-after-free can be triggered by racing\n  between the free on the struct and the access through the `skbtxq`\n  global queue. This could lead to a denial of service condition or\n  potential code execution.\n\nIn aoecmd_cfg_pkts(), it always calls dev_put(ifp) when skb initial\ncode is finished. But the net_device ifp will still be used in\nlater tx()->dev_queue_xmit() in kthread. Which means that the\ndev_put(ifp) should NOT be called in the success path of skb\ninitial code in aoecmd_cfg_pkts(). Otherwise tx() may run into\nuse-after-free because the net_device is freed.\n\nThis patch removed the dev_put(ifp) in the success path in\naoecmd_cfg_pkts(), and added dev_put() after skb xmit in tx()."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7562f876cd93800f2f8c89445f2a563590b24e09","status":"affected","lessThan":"ad80c34944d7175fa1f5c7a55066020002921a99","versionType":"git"},{"version":"7562f876cd93800f2f8c89445f2a563590b24e09","status":"affected","lessThan":"1a54aa506b3b2f31496731039e49778f54eee881","versionType":"git"},{"version":"7562f876cd93800f2f8c89445f2a563590b24e09","status":"affected","lessThan":"faf0b4c5e00bb680e8e43ac936df24d3f48c8e65","versionType":"git"},{"version":"7562f876cd93800f2f8c89445f2a563590b24e09","status":"affected","lessThan":"7dd09fa80b0765ce68bfae92f4e2f395ccf0fba4","versionType":"git"},{"version":"7562f876cd93800f2f8c89445f2a563590b24e09","status":"affected","lessThan":"74ca3ef68d2f449bc848c0a814cefc487bf755fa","versionType":"git"},{"version":"7562f876cd93800f2f8c89445f2a563590b24e09","status":"affected","lessThan":"eb48680b0255a9e8a9bdc93d6a55b11c31262e62","versionType":"git"},{"version":"7562f876cd93800f2f8c89445f2a563590b24e09","status":"affected","lessThan":"079cba4f4e307c69878226fdf5228c20aa1c969c","versionType":"git"},{"version":"7562f876cd93800f2f8c89445f2a563590b24e09","status":"affected","lessThan":"a16fbb80064634b254520a46395e36b87ca4731e","versionType":"git"},{"version":"7562f876cd93800f2f8c89445f2a563590b24e09","status":"affected","lessThan":"f98364e926626c678fb4b9004b75cacf92ff0662","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/block/aoe/aoecmd.c","drivers/block/aoe/aoenet.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.22","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.22","versionType":"semver"},{"version":"4.19.311","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.273","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.214","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.153","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.83","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.23","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.7.11","status":"unaffected","lessThanOrEqual":"6.7.*","versionType":"semver"},{"version":"6.8.2","status":"unaffected","lessThanOrEqual":"6.8.*","versionType":"semver"},{"version":"6.9","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/block/aoe/aoecmd.c","drivers/block/aoe/aoenet.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/ad80c34944d7175fa1f5c7a55066020002921a99"},{"url":"https://git.kernel.org/stable/c/1a54aa506b3b2f31496731039e49778f54eee881"},{"url":"https://git.kernel.org/stable/c/faf0b4c5e00bb680e8e43ac936df24d3f48c8e65"},{"url":"https://git.kernel.org/stable/c/7dd09fa80b0765ce68bfae92f4e2f395ccf0fba4"},{"url":"https://git.kernel.org/stable/c/74ca3ef68d2f449bc848c0a814cefc487bf755fa"},{"url":"https://git.kernel.org/stable/c/eb48680b0255a9e8a9bdc93d6a55b11c31262e62"},{"url":"https://git.kernel.org/stable/c/079cba4f4e307c69878226fdf5228c20aa1c969c"},{"url":"https://git.kernel.org/stable/c/a16fbb80064634b254520a46395e36b87ca4731e"},{"url":"https://git.kernel.org/stable/c/f98364e926626c678fb4b9004b75cacf92ff0662"}],"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 - `aoecmd_cfg_pkts()` is reachable only from `aoecmd_cfg()`, whose callers are the module's 60-second `discover_timer` (drivers/block/aoe/aoemain.c:21), writes to the local char devices `/dev/etherd/discover` and `/dev/etherd/revalidate` (drivers/block/aoe/aoechr.c:74,114), and `aoeblk_release()` on last close of an AoE block device; no inbound AoE frame path (`aoenet_rcv` → `aoecmd_cfg_rsp`) reaches it, so local access is required.\nAC:L - The attacker controls both sides of the race: the queueing side can be driven at will (each `write()` to `/dev/etherd/discover` enumerates every `init_net` netdev and pushes an skb holding an unreferenced `skb->dev` onto the global `skbtxq`, and the kernel timer does it unprompted every 60s), while the window between the erroneous `dev_put(ifp)` and the deferred `dev_queue_xmit(skb)` in the `aoe_tx` kthread is widened arbitrarily by flooding `skbtxq` and loading the CPU; init_net netdev teardown is either directly inducible (e.g. `PPPIOCNEWUNIT`/close on `/dev/ppp`, which carries no capability check) or occurs routinely from container veth churn, VPN teardown and NIC hotplug, so the attack is repeatable until it succeeds.\nPR:L - No capability check exists anywhere on the path — `aoechr_open()` only validates the minor number, and access is gated purely by file permissions on `/dev/etherd/*`, which distro aoetools udev rules grant to the unprivileged `disk` group; an ordinary local user with that access (or with any AoE block device fd, via the `aoeblk_release()` path) can drive discovery, and the periodic timer keeps the vulnerable code executing even with zero attacker action.\nUI:N - The discovery packets are generated by the attacker's own writes or by the driver's automatic one-minute timer, and the freed `net_device` is dereferenced in the `aoe_tx` kthread; no action by any other user is required.\nS:U - The freed `struct net_device` and the code that dereferences it both live in the kernel's own security authority; this is in-kernel memory corruption, not a VM, IOMMU or sandbox boundary crossing.\nC:H - This is a use-after-free on a `struct net_device` whose contents the attacker can reclaim via heap spraying; `tx()` reads `ifp->name` into a `pr_warn()` (leaking freed heap contents to dmesg) and `dev_queue_xmit()` walks `dev->flags`, `dev->_tx`, `dev->num_tx_queues` and `dev->netdev_ops` from the freed object, yielding attacker-steered out-of-bounds reads of kernel memory.\nI:H - `__dev_queue_xmit()` on the freed device loads and calls function pointers (`netdev_ops->ndo_select_queue`, `ndo_start_xmit`, `q->enqueue`) and indexes the `dev->_tx` queue array from reclaimed, attacker-controlled memory, giving a control-flow hijack and out-of-bounds write primitive, not merely a stale read.\nA:H - Even unexploited, transmitting on a freed `net_device` reliably produces a kernel oops or panic in the `aoe_tx` kthread, and the attacker can repeat the trigger 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