{ "data_version": "4.0", "data_type": "CVE", "data_format": "MITRE", "CVE_data_meta": { "ID": "CVE-2024-35888", "ASSIGNER": "cve@kernel.org", "STATE": "PUBLIC" }, "description": { "description_data": [ { "lang": "eng", "value": "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" } ] }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "eng", "value": "n/a" } ] } ] }, "affects": { "vendor": { "vendor_data": [ { "vendor_name": "Linux", "product": { "product_data": [ { "product_name": "Linux", "version": { "version_data": [ { "version_affected": "<", "version_name": "0a198e0bb8be", "version_value": "06a939f72a24" }, { "version_affected": "<", "version_name": "cb73ee40b1b3", "version_value": "e54a0c79cdc2" }, { "version_value": "not down converted", "x_cve_json_5_version_data": { "versions": [ { "version": "5.0", "status": "affected" }, { "version": "0", "lessThan": "5.0", "status": "unaffected", "versionType": "custom" }, { "version": "4.19.312", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.4.274", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.10.215", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.15.154", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.1.85", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.6.26", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.8.5", "lessThanOrEqual": "6.8.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.9", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ], "defaultStatus": "affected" } } ] } } ] } } ] } }, "references": { "reference_data": [ { "url": "https://git.kernel.org/stable/c/06a939f72a24a7d8251f84cf4c042df86c6666ac", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/06a939f72a24a7d8251f84cf4c042df86c6666ac" }, { "url": "https://git.kernel.org/stable/c/e54a0c79cdc2548729dd7e2e468b08c5af4d0df5", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/e54a0c79cdc2548729dd7e2e468b08c5af4d0df5" }, { "url": "https://git.kernel.org/stable/c/b14b9f9503ec823ca75be766dcaeff4f0bfeca85", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/b14b9f9503ec823ca75be766dcaeff4f0bfeca85" }, { "url": "https://git.kernel.org/stable/c/ee0088101beee10fa809716d6245d915b09c37c7", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/ee0088101beee10fa809716d6245d915b09c37c7" }, { "url": "https://git.kernel.org/stable/c/1db7fcb2b290c47c202b79528824f119fa28937d", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/1db7fcb2b290c47c202b79528824f119fa28937d" }, { "url": "https://git.kernel.org/stable/c/4e3fdeecec5707678b0d1f18c259dadb97262e9d", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/4e3fdeecec5707678b0d1f18c259dadb97262e9d" }, { "url": "https://git.kernel.org/stable/c/0ac328a5a4138a6c03dfc3f46017bd5c19167446", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/0ac328a5a4138a6c03dfc3f46017bd5c19167446" }, { "url": "https://git.kernel.org/stable/c/17af420545a750f763025149fa7b833a4fc8b8f0", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/17af420545a750f763025149fa7b833a4fc8b8f0" }, { "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html", "refsource": "MISC", "name": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html" }, { "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html", "refsource": "MISC", "name": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html" } ] }, "generator": { "engine": "bippy-a5840b7849dd" } }