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              "status": "unaffected",
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: fix session state check in reconnect to avoid use-after-free issue\n\nDon\u0027t collect exiting session in smb2_reconnect_server(), because it\nwill be released soon.\n\nNote that the exiting session will stay in server-\u003esmb_ses_list until\nit complete the cifs_free_ipc() and logoff() and then delete itself\nfrom the list."
        }
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            "version": "3.1"
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          "scenarios": [
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              "lang": "en",
              "value": "AV:N - The vulnerable code is the SMB/CIFS client\u0027s reconnect worker, whose execution and timing are dictated entirely by a remote SMB peer (TCP resets, malformed PDUs, STATUS_NETWORK_SESSION_EXPIRED, stalled SMB2_LOGOFF replies, DFS referrals). A malicious/compromised file server or an on-path attacker triggers it purely over TCP/445 with no local access.\nAC:L - The attacker controls both sides of the race: it stalls the SMB2_LOGOFF response to hold the session in SES_EXITING on smb_ses_list for the full response timeout, while forcing smb2_reconnect_server() to run on demand and repeatedly (it also self-requeues every 2 seconds), making the window trivially wide and the hit near-certain.\nPR:N - No credentials or privileges on the victim system are required \u2014 the attacker is the remote server (or an on-path attacker) acting against an existing mount, and the triggering conditions are protocol-level responses that require no authenticated privilege on the client.\nUI:N - Against an already-established mount (fstab, autofs, systemd automount, container share) the attack proceeds with no victim action; the session teardown side is generated by normal client activity such as DFS referral handling and session churn that the attacker itself induces.\nS:U - The freed and reused objects (struct cifs_ses, struct cifs_tcon) and the resulting corruption all live within the kernel\u0027s own security authority, with no crossing into a hypervisor, IOMMU, or other security scope.\nC:H - A use-after-free on a heap-allocated cifs_ses/cifs_tcon lets the attacker groom the freed slab and have the reconnect path read session fields (Suid, auth_key.response, chans[], dfs_root_ses) out of attacker-influenced memory, yielding a kernel information-disclosure primitive.\nI:H - The worker writes into the freed objects \u2014 list_add_tail() stores two pointers into ses-\u003erlist and the freed tcon_ipc-\u003erlist, ses_count is incremented through a dangling dfs_root_ses pointer, and cifs_setup_session() writes ses_status/Suid and frees ses-\u003eauth_key.response \u2014 giving write and controlled-free primitives usable for control-flow hijack.\nA:H - The use-after-free reliably corrupts kernel memory, taking spinlocks and mutexes inside a freed allocation and corrupting list heads, which oopses or panics the machine and can hang the cifs workqueue."
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        "dateUpdated": "2026-08-05T09:16:01.824Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/759ffc164d95a32c09528766d74d9b4fb054e8f4"
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        {
          "url": "https://git.kernel.org/stable/c/99f280700b4cc02d5f141b8d15f8e9fad0418f65"
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      "title": "cifs: fix session state check in reconnect to avoid use-after-free issue",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53794",
    "datePublished": "2025-12-09T00:00:51.061Z",
    "dateReserved": "2025-12-08T23:58:35.274Z",
    "dateUpdated": "2026-08-05T09:16:01.824Z",
    "state": "PUBLISHED"
  },
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          "vendor": "Linux",
          "versions": [
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              "version": "2.6.25"
            },
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              "status": "unaffected",
              "version": "0",
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              "status": "unaffected",
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              "status": "unaffected",
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              "status": "unaffected",
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                  "vulnerable": true
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsched/rt: Fix race in push_rt_task\n\nOverview\n========\nWhen a CPU chooses to call push_rt_task and picks a task to push to\nanother CPU\u0027s runqueue then it will call find_lock_lowest_rq method\nwhich would take a double lock on both CPUs\u0027 runqueues. If one of the\nlocks aren\u0027t readily available, it may lead to dropping the current\nrunqueue lock and reacquiring both the locks at once. During this window\nit is possible that the task is already migrated and is running on some\nother CPU. These cases are already handled. However, if the task is\nmigrated and has already been executed and another CPU is now trying to\nwake it up (ttwu) such that it is queued again on the runqeue\n(on_rq is 1) and also if the task was run by the same CPU, then the\ncurrent checks will pass even though the task was migrated out and is no\nlonger in the pushable tasks list.\n\nCrashes\n=======\nThis bug resulted in quite a few flavors of crashes triggering kernel\npanics with various crash signatures such as assert failures, page\nfaults, null pointer dereferences, and queue corruption errors all\ncoming from scheduler itself.\n\nSome of the crashes:\n-\u003e kernel BUG at kernel/sched/rt.c:1616! BUG_ON(idx \u003e= MAX_RT_PRIO)\n   Call Trace:\n   ? __die_body+0x1a/0x60\n   ? die+0x2a/0x50\n   ? do_trap+0x85/0x100\n   ? pick_next_task_rt+0x6e/0x1d0\n   ? do_error_trap+0x64/0xa0\n   ? pick_next_task_rt+0x6e/0x1d0\n   ? exc_invalid_op+0x4c/0x60\n   ? pick_next_task_rt+0x6e/0x1d0\n   ? asm_exc_invalid_op+0x12/0x20\n   ? pick_next_task_rt+0x6e/0x1d0\n   __schedule+0x5cb/0x790\n   ? update_ts_time_stats+0x55/0x70\n   schedule_idle+0x1e/0x40\n   do_idle+0x15e/0x200\n   cpu_startup_entry+0x19/0x20\n   start_secondary+0x117/0x160\n   secondary_startup_64_no_verify+0xb0/0xbb\n\n-\u003e BUG: kernel NULL pointer dereference, address: 00000000000000c0\n   Call Trace:\n   ? __die_body+0x1a/0x60\n   ? no_context+0x183/0x350\n   ? __warn+0x8a/0xe0\n   ? exc_page_fault+0x3d6/0x520\n   ? asm_exc_page_fault+0x1e/0x30\n   ? pick_next_task_rt+0xb5/0x1d0\n   ? pick_next_task_rt+0x8c/0x1d0\n   __schedule+0x583/0x7e0\n   ? update_ts_time_stats+0x55/0x70\n   schedule_idle+0x1e/0x40\n   do_idle+0x15e/0x200\n   cpu_startup_entry+0x19/0x20\n   start_secondary+0x117/0x160\n   secondary_startup_64_no_verify+0xb0/0xbb\n\n-\u003e BUG: unable to handle page fault for address: ffff9464daea5900\n   kernel BUG at kernel/sched/rt.c:1861! BUG_ON(rq-\u003ecpu != task_cpu(p))\n\n-\u003e kernel BUG at kernel/sched/rt.c:1055! BUG_ON(!rq-\u003enr_running)\n   Call Trace:\n   ? __die_body+0x1a/0x60\n   ? die+0x2a/0x50\n   ? do_trap+0x85/0x100\n   ? dequeue_top_rt_rq+0xa2/0xb0\n   ? do_error_trap+0x64/0xa0\n   ? dequeue_top_rt_rq+0xa2/0xb0\n   ? exc_invalid_op+0x4c/0x60\n   ? dequeue_top_rt_rq+0xa2/0xb0\n   ? asm_exc_invalid_op+0x12/0x20\n   ? dequeue_top_rt_rq+0xa2/0xb0\n   dequeue_rt_entity+0x1f/0x70\n   dequeue_task_rt+0x2d/0x70\n   __schedule+0x1a8/0x7e0\n   ? blk_finish_plug+0x25/0x40\n   schedule+0x3c/0xb0\n   futex_wait_queue_me+0xb6/0x120\n   futex_wait+0xd9/0x240\n   do_futex+0x344/0xa90\n   ? get_mm_exe_file+0x30/0x60\n   ? audit_exe_compare+0x58/0x70\n   ? audit_filter_rules.constprop.26+0x65e/0x1220\n   __x64_sys_futex+0x148/0x1f0\n   do_syscall_64+0x30/0x80\n   entry_SYSCALL_64_after_hwframe+0x62/0xc7\n\n-\u003e BUG: unable to handle page fault for address: ffff8cf3608bc2c0\n   Call Trace:\n   ? __die_body+0x1a/0x60\n   ? no_context+0x183/0x350\n   ? spurious_kernel_fault+0x171/0x1c0\n   ? exc_page_fault+0x3b6/0x520\n   ? plist_check_list+0x15/0x40\n   ? plist_check_list+0x2e/0x40\n   ? asm_exc_page_fault+0x1e/0x30\n   ? _cond_resched+0x15/0x30\n   ? futex_wait_queue_me+0xc8/0x120\n   ? futex_wait+0xd9/0x240\n   ? try_to_wake_up+0x1b8/0x490\n   ? futex_wake+0x78/0x160\n   ? do_futex+0xcd/0xa90\n   ? plist_check_list+0x15/0x40\n   ? plist_check_list+0x2e/0x40\n   ? plist_del+0x6a/0xd0\n   ? plist_check_list+0x15/0x40\n   ? plist_check_list+0x2e/0x40\n   ? dequeue_pushable_task+0x20/0x70\n   ? __schedule+0x382/0x7e0\n   ? asm_sysvec_reschedule_i\n---truncated---"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable code is the core RT scheduler\u0027s task-push balancing path, reached only by running tasks on the local system via scheduling activity (sched_setscheduler, affinity changes, futex wait/wake). There is no network-facing entry point.\nAC:L - Although this is a multi-CPU race, the attacker controls every participant \u2014 spawning RT threads, setting affinity masks to force rq overload and push_rt_task, generating rq-lock contention to widen the double_lock_balance window, and driving the dequeue/wakeup interleaving with tight futex loops \u2014 and can retry indefinitely; the commit notes it fires spontaneously under mere ordinary production load.\nPR:L - An unprivileged local account suffices in realistic deployments, since RLIMIT_RTPRIO is commonly granted to normal users (rtkit-daemon on desktop distros, audio group limits.conf, Android audio threads, container/systemd LimitRTPRIO), and on PREEMPT_RT systems the multi-CPU-affine RT IRQ threads can be driven by plain unprivileged I/O with no RT privilege at all.\nUI:N - The race is triggered entirely by the attacker\u0027s own thread activity and scheduler load; no victim action or interaction of any kind is required.\nS:U - The corruption is confined to kernel scheduler data structures within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The unlocked cross-runqueue dequeue corrupts Y\u0027s plist and prio-array lists and desyncs its counters, so pick_next_rt_entity() type-confuses a list head into a struct sched_rt_entity and the scheduler reads an attacker-shapeable fake task_struct, yielding a kernel memory disclosure/read primitive.\nI:H - Concurrent unsynchronized list_del_init()/plist_del() on a runqueue whose lock is not held is a classic linked-list unlink write primitive, and the resulting bogus task_struct is written to and context-switched into, giving heap-shaping attackers a path to arbitrary write and control-flow hijack.\nA:H - The commit documents repeated kernel panics from this bug \u2014 BUG_ON(idx \u003e= MAX_RT_PRIO), BUG_ON(!rq-\u003enr_running), BUG_ON(rq-\u003ecpu != task_cpu(p)), NULL pointer dereferences, and kernel page faults \u2014 each a full system crash."
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.10",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "4.19.316",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "5.4.262",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "5.10.188",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.3.10",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_tables: fix inverted genmask check in nft_map_catchall_activate()\n\nnft_map_catchall_activate() has an inverted element activity check\ncompared to its non-catchall counterpart nft_mapelem_activate() and\ncompared to what is logically required.\n\nnft_map_catchall_activate() is called from the abort path to re-activate\ncatchall map elements that were deactivated during a failed transaction.\nIt should skip elements that are already active (they don\u0027t need\nre-activation) and process elements that are inactive (they need to be\nrestored). Instead, the current code does the opposite: it skips inactive\nelements and processes active ones.\n\nCompare the non-catchall activate callback, which is correct:\n\n  nft_mapelem_activate():\n    if (nft_set_elem_active(ext, iter-\u003egenmask))\n        return 0;   /* skip active, process inactive */\n\nWith the buggy catchall version:\n\n  nft_map_catchall_activate():\n    if (!nft_set_elem_active(ext, genmask))\n        continue;   /* skip inactive, process active */\n\nThe consequence is that when a DELSET operation is aborted,\nnft_setelem_data_activate() is never called for the catchall element.\nFor NFT_GOTO verdict elements, this means nft_data_hold() is never\ncalled to restore the chain-\u003euse reference count. Each abort cycle\npermanently decrements chain-\u003euse. Once chain-\u003euse reaches zero,\nDELCHAIN succeeds and frees the chain while catchall verdict elements\nstill reference it, resulting in a use-after-free.\n\nThis is exploitable for local privilege escalation from an unprivileged\nuser via user namespaces + nftables on distributions that enable\nCONFIG_USER_NS and CONFIG_NF_TABLES.\n\nFix by removing the negation so the check matches nft_mapelem_activate():\nskip active elements, process inactive ones."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - nftables is accessed via nfnetlink socket (netlink), requiring local system access. This is a local attack vector via syscall/netlink interface.\nAC:L - The attacker fully controls the exploitation: they create the nftables rules with catchall map elements and NFT_GOTO verdicts, trigger repeated DELSET abort cycles to decrement chain-\u003euse to zero, then issue DELCHAIN. No race condition or special conditions beyond attacker control are needed.\nPR:L - nftables requires CAP_NET_ADMIN, but this capability is obtainable by an unprivileged user via user namespaces (unshare -Urn) since nfnetlink uses netlink_net_capable() which checks per-namespace capabilities. The commit message explicitly confirms exploitability from unprivileged users.\nUI:N - No user interaction is required. The attacker creates the nftables configuration, triggers the abort, and exploits the UAF entirely on their own.\nS:U - This is a standard local privilege escalation within the kernel. There is no crossing of virtualization or sandbox boundaries (no VM escape or IOMMU bypass).\nC:H - The use-after-free on the nft_chain structure allows the attacker to reclaim the freed memory with controlled data, providing arbitrary kernel memory read primitives. This is a well-known exploitation technique in nftables UAF bugs.\nI:H - The UAF enables heap spraying the freed chain object to gain arbitrary kernel memory write primitives, leading to full code execution in kernel context (local privilege escalation to root).\nA:H - The use-after-free will cause kernel crashes (oops/panic) when the dangling reference to the freed chain is accessed, and the attacker can trigger this reliably."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:20:18.504Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/8c760ba4e36c750379d13569f23f5a6e185333f5"
        },
        {
          "url": "https://git.kernel.org/stable/c/b9b6573421de51829f7ec1cce76d85f5f6fbbd7f"
        },
        {
          "url": "https://git.kernel.org/stable/c/42c574c1504aa089a0a142e4c13859327570473d"
        },
        {
          "url": "https://git.kernel.org/stable/c/1444ff890b4653add12f734ffeffc173d42862dd"
        },
        {
          "url": "https://git.kernel.org/stable/c/8b68a45f9722f2babe9e7bad00aa74638addf081"
        },
        {
          "url": "https://git.kernel.org/stable/c/f41c5d151078c5348271ffaf8e7410d96f2d82f8"
        }
      ],
      "title": "netfilter: nf_tables: fix inverted genmask check in nft_map_catchall_activate()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23111",
    "datePublished": "2026-02-13T13:29:55.895Z",
    "dateReserved": "2026-01-13T15:37:45.968Z",
    "dateUpdated": "2026-08-05T12:20:18.504Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}