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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: add pskb_may_pull() to skb_gro_receive_list()\n\nskb_gro_receive_list() calls skb_pull(skb, skb_gro_offset(skb)) without\nfirst ensuring the data is in the linear area via pskb_may_pull(). When\nthe skb arrives via napi_gro_frags(), skb_headlen can be 0 (all data in\npage fragments) while skb_gro_offset is non-zero (after IP+TCP header\nparsing). The skb_pull() then decrements skb-\u003elen by skb_gro_offset\nbut skb-\u003edata_len stays unchanged, hitting BUG_ON(skb-\u003elen \u003c skb-\u003edata_len)\nin __skb_pull().\n\nThe UDP fraglist GRO path already contains this guard at\nudp_offload.c:749. Adding it to skb_gro_receive_list() itself provides\ncentralized protection for all callers (TCP, UDP, and any future\nprotocols), and ensures the precondition of skb_pull() is satisfied\nbefore it is called.\n\nOn pskb_may_pull() failure, set NAPI_GRO_CB(skb)-\u003eflush = 1 so the\nskb is not held as a new GRO head and is instead delivered through the\nnormal receive path, matching the UDP handling."
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: anycast: insert aca into global hash under idev-\u003elock\n\nsyzbot reported a splat [1]: a slab-use-after-free in\nipv6_chk_acast_addr(), which walks the global inet6_acaddr_lst[] hash\nunder RCU and dereferences a struct ifacaddr6 that has already been\nfreed while still linked in the hash, so a later reader walks into a\ndangling node.\n\nIn __ipv6_dev_ac_inc() the aca is allocated with refcount 1, then\naca_get() bumps it to 2 to keep it alive across the unlocked region.\nIt is published to idev-\u003eac_list under idev-\u003elock, but\nipv6_add_acaddr_hash() runs after write_unlock_bh(). A concurrent\nteardown (ipv6_ac_destroy_dev() from addrconf_ifdown(), under RTNL)\ncan slip into that window:\n\n  CPU0 __ipv6_dev_ac_inc           CPU1 ipv6_ac_destroy_dev (RTNL)\n  ------------------------------   ------------------------------------\n  aca_alloc()              refcnt 1\n  aca_get()               refcnt 2\n  write_lock_bh(idev-\u003elock)\n    add aca to ac_list\n  write_unlock_bh(idev-\u003elock)\n                                   write_lock_bh(idev-\u003elock)\n                                     pull aca off ac_list\n                                   write_unlock_bh(idev-\u003elock)\n                                   ipv6_del_acaddr_hash(aca)\n                                     hlist_del_init_rcu() is a no-op,\n                                     aca is not in the hash yet\n                                   aca_put()           refcnt 2-\u003e1\n  ipv6_add_acaddr_hash(aca)\n    aca now inserted into the hash\n  aca_put()                refcnt 1-\u003e0\n    call_rcu(aca_free_rcu) -\u003e kfree(aca)\n\nThe hash removal becomes a no-op because the insertion has not\nhappened yet, so once CPU0 inserts and drops the last reference, the\naca is freed while still linked in inet6_acaddr_lst[], and readers\ndereference freed memory after the slab slot is reused.\n\nThis window opened once RTNL stopped serializing the join path against\ndevice teardown. Move ipv6_add_acaddr_hash() inside the idev-\u003elock\nsection so the ac_list and hash insertions are atomic with respect to\nteardown: a racing remover now either misses the aca entirely or finds\nit in both lists.\n\nacaddr_hash_lock is now nested under idev-\u003elock, which is acquired in\nsoftirq context, so switch all acaddr_hash_lock sites to spin_lock_bh()\nto avoid the irq lock inversion reported in [2].\n\n[1] https://syzkaller.appspot.com/bug?extid=a01df04303c131efbf3a\n[2] https://lore.kernel.org/netdev/6a194ef7.ba3b1513.1890b4.0000.GAE@google.com/"
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              "value": "AV:L - The vulnerable anycast insertion path is reached through local IPv6 socket configuration such as setsockopt(IPV6_JOIN_ANYCAST), with teardown driven by local netdevice unregister/down paths. Remote packets can hit a later reader, but an attacker must first locally create the dangling anycast object.\nAC:L - The bug is a race between anycast join and device teardown, and a local attacker with net namespace control can drive both sides concurrently and retry. No rare external condition is required beyond winning an attacker-created race.\nPR:L - The join path checks CAP_NET_ADMIN in net-\u003euser_ns, which is reachable by an unprivileged user in a user/network namespace on systems permitting unprivileged user namespaces. It does not require real init-namespace root in the highest reasonable scenario.\nUI:N - Exploitation does not require a victim user to open a file, mount a filesystem, or perform any action. The attacker can invoke the socket option and teardown paths directly.\nS:U - The impact is within the kernel/network namespace security authority and does not cross a VM, IOMMU, or separate trust boundary. Kernel privilege escalation or kernel crash is scored as unchanged scope.\nC:H - This is a slab use-after-free where a freed ifacaddr6 remains linked in the global anycast hash and later readers dereference reused heap contents including pointers. Per kernel UAF guidance and the dangling global pointer primitive, high confidentiality impact is appropriate.\nI:H - A kernel use-after-free with attacker-influenced heap reuse can potentially be shaped into memory corruption or control-flow/data corruption primitives. When uncertain for UAF exploitability, the higher severity integrity impact is selected.\nA:H - syzbot reported a KASAN slab-use-after-free in ipv6_chk_acast_addr, and dereferencing the stale object can crash/oops the kernel. This is high availability impact."
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/nvme/target/fabrics-cmd-auth.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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              "version": "6.0"
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              "version": "0",
              "versionType": "semver"
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              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.96",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.39",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
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        {
          "nodes": [
            {
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                  "versionEndExcluding": "6.6.145",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.96",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.39",
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                  "vulnerable": true
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                {
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                {
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                  "vulnerable": true
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              ],
              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet-auth: validate reply message payload bounds against transfer length\n\nnvmet_auth_reply() accesses the variable-length rval[] array using\nattacker-controlled hl (hash length) and dhvlen (DH value length) fields\nwithout verifying they fit within the allocated buffer of tl bytes.\n\nA malicious NVMe-oF initiator can craft a DHCHAP_REPLY message with a\nsmall transfer length but large hl/dhvlen values, causing out-of-bounds\nheap reads when the target processes the DH public key (rval + 2*hl) or\nperforms the host response memcmp.\n\nWith DH authentication configured, the OOB pointer is passed directly to\nsg_init_one() and read by crypto_kpp_compute_shared_secret(), reaching\nup to 526 bytes past the buffer. This is exploitable pre-authentication.\n\nAdd bounds validation ensuring sizeof(*data) + 2*hl + dhvlen \u003c= tl before\nany access to the variable-length fields.\n\nDiscovered by Atuin - Automated Vulnerability Discovery Engine."
        }
      ],
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            "baseScore": 9.1,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - A remote peer can send the malformed Authentication Send command over NVMe/TCP, which dispatches it through nvmet_req_init() and nvmet_parse_fabrics_admin_cmd() to nvmet_execute_auth_send() and nvmet_auth_reply().\nAC:L - The attacker drives the required Connect, Negotiate, Receive, and Reply sequence and controls the transfer length, hash length, DH length, and transaction ID. No race or condition outside the attacker\u0027s control is required.\nPR:N - The allowed Host NQN is an attacker-supplied protocol identifier rather than a credential, and the actual DH-HMAC-CHAP secret is not verified until after the vulnerable read. The path is therefore exploitable pre-authentication.\nUI:N - No victim action is required after the target service and authentication configuration are active; the remote initiator independently completes the protocol sequence.\nS:U - The vulnerable NVMe target code and the affected kernel memory and availability belong to the same host security authority, with no demonstrated VM, IOMMU, or sandbox boundary crossing.\nC:H - The attacker controls a substantial kernel heap over-read through memcmp and the crypto scatterlist/MPI path, with the input pointer reaching hundreds of bytes beyond the allocation and an attacker-selected read length. Adjacent kernel secrets and pointers are therefore at risk.\nI:N - All identified unsafe accesses are reads into correctly sized cryptographic output buffers. No out-of-bounds write, arbitrary modification, or defensible authentication bypass was found.\nA:H - The crypto/MPI over-read can traverse heap-object and page boundaries and fault in kernel context, causing an oops or panic that takes down the storage target or host. An unauthenticated peer can reconnect and trigger it repeatedly."
            }
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    "cveId": "CVE-2026-64319",
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