{"api_version":"1","generated_at":"2026-07-23T12:10:56+00:00","cve":"CVE-2024-35888","urls":{"html":"https://cve.report/CVE-2024-35888","api":"https://cve.report/api/cve/CVE-2024-35888.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2024-35888","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2024-35888"},"summary":{"title":"erspan: make sure erspan_base_hdr is present in skb->head","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nerspan: make sure erspan_base_hdr is present in skb->head\n\nsyzbot reported a problem in ip6erspan_rcv() [1]\n\nIssue is that ip6erspan_rcv() (and erspan_rcv()) no longer make\nsure erspan_base_hdr is present in skb linear part (skb->head)\nbefore getting @ver field from it.\n\nAdd the missing pskb_may_pull() calls.\n\nv2: Reload iph pointer in erspan_rcv() after pskb_may_pull()\n    because skb->head might have changed.\n\n[1]\n\n BUG: KMSAN: uninit-value in pskb_may_pull_reason include/linux/skbuff.h:2742 [inline]\n BUG: KMSAN: uninit-value in pskb_may_pull include/linux/skbuff.h:2756 [inline]\n BUG: KMSAN: uninit-value in ip6erspan_rcv net/ipv6/ip6_gre.c:541 [inline]\n BUG: KMSAN: uninit-value in gre_rcv+0x11f8/0x1930 net/ipv6/ip6_gre.c:610\n  pskb_may_pull_reason include/linux/skbuff.h:2742 [inline]\n  pskb_may_pull include/linux/skbuff.h:2756 [inline]\n  ip6erspan_rcv net/ipv6/ip6_gre.c:541 [inline]\n  gre_rcv+0x11f8/0x1930 net/ipv6/ip6_gre.c:610\n  ip6_protocol_deliver_rcu+0x1d4c/0x2ca0 net/ipv6/ip6_input.c:438\n  ip6_input_finish net/ipv6/ip6_input.c:483 [inline]\n  NF_HOOK include/linux/netfilter.h:314 [inline]\n  ip6_input+0x15d/0x430 net/ipv6/ip6_input.c:492\n  ip6_mc_input+0xa7e/0xc80 net/ipv6/ip6_input.c:586\n  dst_input include/net/dst.h:460 [inline]\n  ip6_rcv_finish+0x955/0x970 net/ipv6/ip6_input.c:79\n  NF_HOOK include/linux/netfilter.h:314 [inline]\n  ipv6_rcv+0xde/0x390 net/ipv6/ip6_input.c:310\n  __netif_receive_skb_one_core net/core/dev.c:5538 [inline]\n  __netif_receive_skb+0x1da/0xa00 net/core/dev.c:5652\n  netif_receive_skb_internal net/core/dev.c:5738 [inline]\n  netif_receive_skb+0x58/0x660 net/core/dev.c:5798\n  tun_rx_batched+0x3ee/0x980 drivers/net/tun.c:1549\n  tun_get_user+0x5566/0x69e0 drivers/net/tun.c:2002\n  tun_chr_write_iter+0x3af/0x5d0 drivers/net/tun.c:2048\n  call_write_iter include/linux/fs.h:2108 [inline]\n  new_sync_write fs/read_write.c:497 [inline]\n  vfs_write+0xb63/0x1520 fs/read_write.c:590\n  ksys_write+0x20f/0x4c0 fs/read_write.c:643\n  __do_sys_write fs/read_write.c:655 [inline]\n  __se_sys_write fs/read_write.c:652 [inline]\n  __x64_sys_write+0x93/0xe0 fs/read_write.c:652\n do_syscall_64+0xd5/0x1f0\n entry_SYSCALL_64_after_hwframe+0x6d/0x75\n\nUninit was created at:\n  slab_post_alloc_hook mm/slub.c:3804 [inline]\n  slab_alloc_node mm/slub.c:3845 [inline]\n  kmem_cache_alloc_node+0x613/0xc50 mm/slub.c:3888\n  kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:577\n  __alloc_skb+0x35b/0x7a0 net/core/skbuff.c:668\n  alloc_skb include/linux/skbuff.h:1318 [inline]\n  alloc_skb_with_frags+0xc8/0xbf0 net/core/skbuff.c:6504\n  sock_alloc_send_pskb+0xa81/0xbf0 net/core/sock.c:2795\n  tun_alloc_skb drivers/net/tun.c:1525 [inline]\n  tun_get_user+0x209a/0x69e0 drivers/net/tun.c:1846\n  tun_chr_write_iter+0x3af/0x5d0 drivers/net/tun.c:2048\n  call_write_iter include/linux/fs.h:2108 [inline]\n  new_sync_write fs/read_write.c:497 [inline]\n  vfs_write+0xb63/0x1520 fs/read_write.c:590\n  ksys_write+0x20f/0x4c0 fs/read_write.c:643\n  __do_sys_write fs/read_write.c:655 [inline]\n  __se_sys_write fs/read_write.c:652 [inline]\n  __x64_sys_write+0x93/0xe0 fs/read_write.c:652\n do_syscall_64+0xd5/0x1f0\n entry_SYSCALL_64_after_hwframe+0x6d/0x75\n\nCPU: 1 PID: 5045 Comm: syz-executor114 Not tainted 6.9.0-rc1-syzkaller-00021-g962490525cff #0","state":"PUBLISHED","assigner":"Linux","published_at":"2024-05-19 09:15:09","updated_at":"2026-05-12 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the Linux kernel, the following vulnerability has been resolved:\n\nerspan: make sure erspan_base_hdr is present in skb->head\n\nsyzbot reported a problem in ip6erspan_rcv() [1]\n\nIssue is that ip6erspan_rcv() (and erspan_rcv()) no longer make\nsure erspan_base_hdr is present in skb linear part (skb->head)\nbefore getting @ver field from it.\n\nAdd the missing pskb_may_pull() calls.\n\nv2: Reload iph pointer in erspan_rcv() after pskb_may_pull()\n    because skb->head might have changed.\n\n[1]\n\n BUG: KMSAN: uninit-value in pskb_may_pull_reason include/linux/skbuff.h:2742 [inline]\n BUG: KMSAN: uninit-value in pskb_may_pull include/linux/skbuff.h:2756 [inline]\n BUG: KMSAN: uninit-value in ip6erspan_rcv net/ipv6/ip6_gre.c:541 [inline]\n BUG: KMSAN: uninit-value in gre_rcv+0x11f8/0x1930 net/ipv6/ip6_gre.c:610\n  pskb_may_pull_reason include/linux/skbuff.h:2742 [inline]\n  pskb_may_pull include/linux/skbuff.h:2756 [inline]\n  ip6erspan_rcv net/ipv6/ip6_gre.c:541 [inline]\n  gre_rcv+0x11f8/0x1930 net/ipv6/ip6_gre.c:610\n  ip6_protocol_deliver_rcu+0x1d4c/0x2ca0 net/ipv6/ip6_input.c:438\n  ip6_input_finish net/ipv6/ip6_input.c:483 [inline]\n  NF_HOOK include/linux/netfilter.h:314 [inline]\n  ip6_input+0x15d/0x430 net/ipv6/ip6_input.c:492\n  ip6_mc_input+0xa7e/0xc80 net/ipv6/ip6_input.c:586\n  dst_input include/net/dst.h:460 [inline]\n  ip6_rcv_finish+0x955/0x970 net/ipv6/ip6_input.c:79\n  NF_HOOK include/linux/netfilter.h:314 [inline]\n  ipv6_rcv+0xde/0x390 net/ipv6/ip6_input.c:310\n  __netif_receive_skb_one_core net/core/dev.c:5538 [inline]\n  __netif_receive_skb+0x1da/0xa00 net/core/dev.c:5652\n  netif_receive_skb_internal net/core/dev.c:5738 [inline]\n  netif_receive_skb+0x58/0x660 net/core/dev.c:5798\n  tun_rx_batched+0x3ee/0x980 drivers/net/tun.c:1549\n  tun_get_user+0x5566/0x69e0 drivers/net/tun.c:2002\n  tun_chr_write_iter+0x3af/0x5d0 drivers/net/tun.c:2048\n  call_write_iter include/linux/fs.h:2108 [inline]\n  new_sync_write fs/read_write.c:497 [inline]\n  vfs_write+0xb63/0x1520 fs/read_write.c:590\n  ksys_write+0x20f/0x4c0 fs/read_write.c:643\n  __do_sys_write fs/read_write.c:655 [inline]\n  __se_sys_write fs/read_write.c:652 [inline]\n  __x64_sys_write+0x93/0xe0 fs/read_write.c:652\n do_syscall_64+0xd5/0x1f0\n entry_SYSCALL_64_after_hwframe+0x6d/0x75\n\nUninit was created at:\n  slab_post_alloc_hook mm/slub.c:3804 [inline]\n  slab_alloc_node mm/slub.c:3845 [inline]\n  kmem_cache_alloc_node+0x613/0xc50 mm/slub.c:3888\n  kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:577\n  __alloc_skb+0x35b/0x7a0 net/core/skbuff.c:668\n  alloc_skb include/linux/skbuff.h:1318 [inline]\n  alloc_skb_with_frags+0xc8/0xbf0 net/core/skbuff.c:6504\n  sock_alloc_send_pskb+0xa81/0xbf0 net/core/sock.c:2795\n  tun_alloc_skb drivers/net/tun.c:1525 [inline]\n  tun_get_user+0x209a/0x69e0 drivers/net/tun.c:1846\n  tun_chr_write_iter+0x3af/0x5d0 drivers/net/tun.c:2048\n  call_write_iter include/linux/fs.h:2108 [inline]\n  new_sync_write fs/read_write.c:497 [inline]\n  vfs_write+0xb63/0x1520 fs/read_write.c:590\n  ksys_write+0x20f/0x4c0 fs/read_write.c:643\n  __do_sys_write fs/read_write.c:655 [inline]\n  __se_sys_write fs/read_write.c:652 [inline]\n  __x64_sys_write+0x93/0xe0 fs/read_write.c:652\n do_syscall_64+0xd5/0x1f0\n entry_SYSCALL_64_after_hwframe+0x6d/0x75\n\nCPU: 1 PID: 5045 Comm: syz-executor114 Not tainted 6.9.0-rc1-syzkaller-00021-g962490525cff #0"}],"providerMetadata":{"dateUpdated":"2026-05-11T20:13:11.000Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/06a939f72a24a7d8251f84cf4c042df86c6666ac"},{"url":"https://git.kernel.org/stable/c/e54a0c79cdc2548729dd7e2e468b08c5af4d0df5"},{"url":"https://git.kernel.org/stable/c/b14b9f9503ec823ca75be766dcaeff4f0bfeca85"},{"url":"https://git.kernel.org/stable/c/ee0088101beee10fa809716d6245d915b09c37c7"},{"url":"https://git.kernel.org/stable/c/1db7fcb2b290c47c202b79528824f119fa28937d"},{"url":"https://git.kernel.org/stable/c/4e3fdeecec5707678b0d1f18c259dadb97262e9d"},{"url":"https://git.kernel.org/stable/c/0ac328a5a4138a6c03dfc3f46017bd5c19167446"},{"url":"https://git.kernel.org/stable/c/17af420545a750f763025149fa7b833a4fc8b8f0"}],"title":"erspan: make sure erspan_base_hdr is present in skb->head","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2024-35888","datePublished":"2024-05-19T08:34:44.428Z","dateReserved":"2024-05-17T13:50:33.113Z","dateUpdated":"2026-05-12T11:52:27.203Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2024-05-19 09:15:09","lastModifiedDate":"2026-05-12 12:16:38","problem_types":["CWE-908","CWE-noinfo Not enough information"],"metrics":{"cvssMetricV31":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":3.6}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19.20","versionEndExcluding":"4.19.312","matchCriteriaId":"F0D24309-1763-44E1-BB27-62AC77BD7F43"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20.7","versionEndExcluding":"5.4.274","matchCriteriaId":"C354BFC9-A7DA-4EDA-A5FB-16BEFEB50B7E"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"5.10.215","matchCriteriaId":"9CD5894E-58E9-4B4A-B0F4-3E6BC134B8F5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"5.15.154","matchCriteriaId":"577E212E-7E95-4A71-9B5C-F1D1A3AFFF46"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"6.1.85","matchCriteriaId":"325665BF-2409-49D9-B391-39AD4566FDBD"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.6.26","matchCriteriaId":"C520696A-A594-4FFC-A32D-12DA535CE911"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.8.5","matchCriteriaId":"DBD6C99E-4250-4DFE-8447-FF2075939D10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.9:rc1:*:*:*:*:*:*","matchCriteriaId":"22BEDD49-2C6D-402D-9DBF-6646F6ECD10B"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.9:rc2:*:*:*:*:*:*","matchCriteriaId":"DF73CB2A-DFFD-46FB-9BFE-AA394F27EA37"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*","matchCriteriaId":"07B237A9-69A3-4A9C-9DA0-4E06BD37AE73"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2024","CveId":"35888","Ordinal":"1","Title":"erspan: make sure erspan_base_hdr is present in skb->head","CVE":"CVE-2024-35888","Year":"2024"},"notes":[{"CveYear":"2024","CveId":"35888","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nerspan: make sure erspan_base_hdr is present in skb->head\n\nsyzbot reported a problem in ip6erspan_rcv() [1]\n\nIssue is that ip6erspan_rcv() (and erspan_rcv()) no longer make\nsure erspan_base_hdr is present in skb linear part (skb->head)\nbefore getting @ver field from it.\n\nAdd the missing pskb_may_pull() calls.\n\nv2: Reload iph pointer in erspan_rcv() after pskb_may_pull()\n    because skb->head might have changed.\n\n[1]\n\n BUG: KMSAN: uninit-value in pskb_may_pull_reason include/linux/skbuff.h:2742 [inline]\n BUG: KMSAN: uninit-value in pskb_may_pull include/linux/skbuff.h:2756 [inline]\n BUG: KMSAN: uninit-value in ip6erspan_rcv net/ipv6/ip6_gre.c:541 [inline]\n BUG: KMSAN: uninit-value in gre_rcv+0x11f8/0x1930 net/ipv6/ip6_gre.c:610\n  pskb_may_pull_reason include/linux/skbuff.h:2742 [inline]\n  pskb_may_pull include/linux/skbuff.h:2756 [inline]\n  ip6erspan_rcv net/ipv6/ip6_gre.c:541 [inline]\n  gre_rcv+0x11f8/0x1930 net/ipv6/ip6_gre.c:610\n  ip6_protocol_deliver_rcu+0x1d4c/0x2ca0 net/ipv6/ip6_input.c:438\n  ip6_input_finish net/ipv6/ip6_input.c:483 [inline]\n  NF_HOOK include/linux/netfilter.h:314 [inline]\n  ip6_input+0x15d/0x430 net/ipv6/ip6_input.c:492\n  ip6_mc_input+0xa7e/0xc80 net/ipv6/ip6_input.c:586\n  dst_input include/net/dst.h:460 [inline]\n  ip6_rcv_finish+0x955/0x970 net/ipv6/ip6_input.c:79\n  NF_HOOK include/linux/netfilter.h:314 [inline]\n  ipv6_rcv+0xde/0x390 net/ipv6/ip6_input.c:310\n  __netif_receive_skb_one_core net/core/dev.c:5538 [inline]\n  __netif_receive_skb+0x1da/0xa00 net/core/dev.c:5652\n  netif_receive_skb_internal net/core/dev.c:5738 [inline]\n  netif_receive_skb+0x58/0x660 net/core/dev.c:5798\n  tun_rx_batched+0x3ee/0x980 drivers/net/tun.c:1549\n  tun_get_user+0x5566/0x69e0 drivers/net/tun.c:2002\n  tun_chr_write_iter+0x3af/0x5d0 drivers/net/tun.c:2048\n  call_write_iter include/linux/fs.h:2108 [inline]\n  new_sync_write fs/read_write.c:497 [inline]\n  vfs_write+0xb63/0x1520 fs/read_write.c:590\n  ksys_write+0x20f/0x4c0 fs/read_write.c:643\n  __do_sys_write fs/read_write.c:655 [inline]\n  __se_sys_write fs/read_write.c:652 [inline]\n  __x64_sys_write+0x93/0xe0 fs/read_write.c:652\n do_syscall_64+0xd5/0x1f0\n entry_SYSCALL_64_after_hwframe+0x6d/0x75\n\nUninit was created at:\n  slab_post_alloc_hook mm/slub.c:3804 [inline]\n  slab_alloc_node mm/slub.c:3845 [inline]\n  kmem_cache_alloc_node+0x613/0xc50 mm/slub.c:3888\n  kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:577\n  __alloc_skb+0x35b/0x7a0 net/core/skbuff.c:668\n  alloc_skb include/linux/skbuff.h:1318 [inline]\n  alloc_skb_with_frags+0xc8/0xbf0 net/core/skbuff.c:6504\n  sock_alloc_send_pskb+0xa81/0xbf0 net/core/sock.c:2795\n  tun_alloc_skb drivers/net/tun.c:1525 [inline]\n  tun_get_user+0x209a/0x69e0 drivers/net/tun.c:1846\n  tun_chr_write_iter+0x3af/0x5d0 drivers/net/tun.c:2048\n  call_write_iter include/linux/fs.h:2108 [inline]\n  new_sync_write fs/read_write.c:497 [inline]\n  vfs_write+0xb63/0x1520 fs/read_write.c:590\n  ksys_write+0x20f/0x4c0 fs/read_write.c:643\n  __do_sys_write fs/read_write.c:655 [inline]\n  __se_sys_write fs/read_write.c:652 [inline]\n  __x64_sys_write+0x93/0xe0 fs/read_write.c:652\n do_syscall_64+0xd5/0x1f0\n entry_SYSCALL_64_after_hwframe+0x6d/0x75\n\nCPU: 1 PID: 5045 Comm: syz-executor114 Not tainted 6.9.0-rc1-syzkaller-00021-g962490525cff #0","Type":"Description","Title":"erspan: make sure erspan_base_hdr is present in skb->head"}]}}}