CVSS: 7.0EPSS: 0%CPEs: 3EXPL: 0CVE-2023-52581 – netfilter: nf_tables: fix memleak when more than 255 elements expired
https://notcve.org/view.php?id=CVE-2023-52581
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: fix memleak when more than 255 elements expired When more than 255 elements expired we're supposed to switch to a new gc container structure. This never happens: u8 type will wrap before reaching the boundary and nft_trans_gc_space() always returns true. This means we recycle the initial gc container structure and lose track of the elements that came before. While at it, don't deref 'gc' after we've passed it to call_rcu. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfilter: nf_tables: corrige memleak cuando caducan más de 255 elementos Cuando caducan más de 255 elementos, se supone que debemos cambiar a una nueva estructura de contenedor gc. Esto nunca sucede: el tipo u8 se ajustará antes de alcanzar el límite y nft_trans_gc_space() siempre devuelve verdadero. Esto significa que reciclamos la estructura inicial del contenedor gc y perdemos la pista de los elementos anteriores. Mientras lo hace, no elimine 'gc' después de que lo hayamos pasado a call_rcu. • https://git.kernel.org/stable/c/5f68718b34a531a556f2f50300ead2862278da26 https://git.kernel.org/stable/c/0624f190b5742a1527cd938295caa8dc5281d4cd https://git.kernel.org/stable/c/4aea243b6853d06c1d160a9955b759189aa02b14 https://git.kernel.org/stable/c/cf5000a7787cbc10341091d37245a42c119d26c5 https://git.kernel.org/stable/c/7cf055b43756b10aa2b851c927c940f5ed652125 https://git.kernel.org/stable/c/a995a68e8a3b48533e47c856865d109a1f1a9d01 https://git.kernel.org/stable/c/09c85f2d21ab6b5acba31a037985b13e8e6565b8 https://git.kernel.org/stable/c/ef99506eaf1dc31feff1adfcfd68bc553 • CWE-401: Missing Release of Memory after Effective Lifetime •
CVSS: 5.5EPSS: 0%CPEs: 4EXPL: 0CVE-2023-52580 – net/core: Fix ETH_P_1588 flow dissector
https://notcve.org/view.php?id=CVE-2023-52580
In the Linux kernel, the following vulnerability has been resolved: net/core: Fix ETH_P_1588 flow dissector When a PTP ethernet raw frame with a size of more than 256 bytes followed by a 0xff pattern is sent to __skb_flow_dissect, nhoff value calculation is wrong. For example: hdr->message_length takes the wrong value (0xffff) and it does not replicate real header length. In this case, 'nhoff' value was overridden and the PTP header was badly dissected. This leads to a kernel crash. net/core: flow_dissector net/core flow dissector nhoff = 0x0000000e net/core flow dissector hdr->message_length = 0x0000ffff net/core flow dissector nhoff = 0x0001000d (u16 overflow) ... skb linear: 00000000: 00 a0 c9 00 00 00 00 a0 c9 00 00 00 88 skb frag: 00000000: f7 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff Using the size of the ptp_header struct will allow the corrected calculation of the nhoff value. net/core flow dissector nhoff = 0x0000000e net/core flow dissector nhoff = 0x00000030 (sizeof ptp_header) ... skb linear: 00000000: 00 a0 c9 00 00 00 00 a0 c9 00 00 00 88 f7 ff ff skb linear: 00000010: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff skb linear: 00000020: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff skb frag: 00000000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff Kernel trace: [ 74.984279] ------------[ cut here ]------------ [ 74.989471] kernel BUG at include/linux/skbuff.h:2440! [ 74.995237] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI [ 75.001098] CPU: 4 PID: 0 Comm: swapper/4 Tainted: G U 5.15.85-intel-ese-standard-lts #1 [ 75.011629] Hardware name: Intel Corporation A-Island (CPU:AlderLake)/A-Island (ID:06), BIOS SB_ADLP.01.01.00.01.03.008.D-6A9D9E73-dirty Mar 30 2023 [ 75.026507] RIP: 0010:eth_type_trans+0xd0/0x130 [ 75.031594] Code: 03 88 47 78 eb c7 8b 47 68 2b 47 6c 48 8b 97 c0 00 00 00 83 f8 01 7e 1b 48 85 d2 74 06 66 83 3a ff 74 09 b8 00 04 00 00 eb ab <0f> 0b b8 00 01 00 00 eb a2 48 85 ff 74 eb 48 8d 54 24 06 31 f6 b9 [ 75.052612] RSP: 0018:ffff9948c0228de0 EFLAGS: 00010297 [ 75.058473] RAX: 00000000000003f2 RBX: ffff8e47047dc300 RCX: 0000000000001003 [ 75.066462] RDX: ffff8e4e8c9ea040 RSI: ffff8e4704e0a000 RDI: ffff8e47047dc300 [ 75.074458] RBP: ffff8e4704e2acc0 R08: 00000000000003f3 R09: 0000000000000800 [ 75.082466] R10: 000000000000000d R11: ffff9948c0228dec R12: ffff8e4715e4e010 [ 75.090461] R13: ffff9948c0545018 R14: 0000000000000001 R15: 0000000000000800 [ 75.098464] FS: 0000000000000000(0000) GS:ffff8e4e8fb00000(0000) knlGS:0000000000000000 [ 75.107530] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 75.113982] CR2: 00007f5eb35934a0 CR3: 0000000150e0a002 CR4: 0000000000770ee0 [ 75.121980] PKRU: 55555554 [ 75.125035] Call Trace: [ 75.127792] <IRQ> [ 75.130063] ? • https://git.kernel.org/stable/c/4f1cc51f34886d645cd3e8fc2915cc9b7a55c3b6 https://git.kernel.org/stable/c/f90a7b9586d72f907092078a9f394733ca502cc9 https://git.kernel.org/stable/c/488ea2a3e2666022f79abfdd7d12e8305fc27a40 https://git.kernel.org/stable/c/48e105a2a1a10adc21c0ae717969f5e8e990ba48 https://git.kernel.org/stable/c/75ad80ed88a182ab2ad5513e448cf07b403af5c3 https://access.redhat.com/security/cve/CVE-2023-52580 https://bugzilla.redhat.com/show_bug.cgi?id=2267760 • CWE-131: Incorrect Calculation of Buffer Size •
CVSS: 4.7EPSS: 0%CPEs: 7EXPL: 0CVE-2023-52578 – net: bridge: use DEV_STATS_INC()
https://notcve.org/view.php?id=CVE-2023-52578
In the Linux kernel, the following vulnerability has been resolved: net: bridge: use DEV_STATS_INC() syzbot/KCSAN reported data-races in br_handle_frame_finish() [1] This function can run from multiple cpus without mutual exclusion. Adopt SMP safe DEV_STATS_INC() to update dev->stats fields. Handles updates to dev->stats.tx_dropped while we are at it. [1] BUG: KCSAN: data-race in br_handle_frame_finish / br_handle_frame_finish read-write to 0xffff8881374b2178 of 8 bytes by interrupt on cpu 1: br_handle_frame_finish+0xd4f/0xef0 net/bridge/br_input.c:189 br_nf_hook_thresh+0x1ed/0x220 br_nf_pre_routing_finish_ipv6+0x50f/0x540 NF_HOOK include/linux/netfilter.h:304 [inline] br_nf_pre_routing_ipv6+0x1e3/0x2a0 net/bridge/br_netfilter_ipv6.c:178 br_nf_pre_routing+0x526/0xba0 net/bridge/br_netfilter_hooks.c:508 nf_hook_entry_hookfn include/linux/netfilter.h:144 [inline] nf_hook_bridge_pre net/bridge/br_input.c:272 [inline] br_handle_frame+0x4c9/0x940 net/bridge/br_input.c:417 __netif_receive_skb_core+0xa8a/0x21e0 net/core/dev.c:5417 __netif_receive_skb_one_core net/core/dev.c:5521 [inline] __netif_receive_skb+0x57/0x1b0 net/core/dev.c:5637 process_backlog+0x21f/0x380 net/core/dev.c:5965 __napi_poll+0x60/0x3b0 net/core/dev.c:6527 napi_poll net/core/dev.c:6594 [inline] net_rx_action+0x32b/0x750 net/core/dev.c:6727 __do_softirq+0xc1/0x265 kernel/softirq.c:553 run_ksoftirqd+0x17/0x20 kernel/softirq.c:921 smpboot_thread_fn+0x30a/0x4a0 kernel/smpboot.c:164 kthread+0x1d7/0x210 kernel/kthread.c:388 ret_from_fork+0x48/0x60 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 read-write to 0xffff8881374b2178 of 8 bytes by interrupt on cpu 0: br_handle_frame_finish+0xd4f/0xef0 net/bridge/br_input.c:189 br_nf_hook_thresh+0x1ed/0x220 br_nf_pre_routing_finish_ipv6+0x50f/0x540 NF_HOOK include/linux/netfilter.h:304 [inline] br_nf_pre_routing_ipv6+0x1e3/0x2a0 net/bridge/br_netfilter_ipv6.c:178 br_nf_pre_routing+0x526/0xba0 net/bridge/br_netfilter_hooks.c:508 nf_hook_entry_hookfn include/linux/netfilter.h:144 [inline] nf_hook_bridge_pre net/bridge/br_input.c:272 [inline] br_handle_frame+0x4c9/0x940 net/bridge/br_input.c:417 __netif_receive_skb_core+0xa8a/0x21e0 net/core/dev.c:5417 __netif_receive_skb_one_core net/core/dev.c:5521 [inline] __netif_receive_skb+0x57/0x1b0 net/core/dev.c:5637 process_backlog+0x21f/0x380 net/core/dev.c:5965 __napi_poll+0x60/0x3b0 net/core/dev.c:6527 napi_poll net/core/dev.c:6594 [inline] net_rx_action+0x32b/0x750 net/core/dev.c:6727 __do_softirq+0xc1/0x265 kernel/softirq.c:553 do_softirq+0x5e/0x90 kernel/softirq.c:454 __local_bh_enable_ip+0x64/0x70 kernel/softirq.c:381 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:167 [inline] _raw_spin_unlock_bh+0x36/0x40 kernel/locking/spinlock.c:210 spin_unlock_bh include/linux/spinlock.h:396 [inline] batadv_tt_local_purge+0x1a8/0x1f0 net/batman-adv/translation-table.c:1356 batadv_tt_purge+0x2b/0x630 net/batman-adv/translation-table.c:3560 process_one_work kernel/workqueue.c:2630 [inline] process_scheduled_works+0x5b8/0xa30 kernel/workqueue.c:2703 worker_thread+0x525/0x730 kernel/workqueue.c:2784 kthread+0x1d7/0x210 kernel/kthread.c:388 ret_from_fork+0x48/0x60 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 value changed: 0x00000000000d7190 -> 0x00000000000d7191 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 14848 Comm: kworker/u4:11 Not tainted 6.6.0-rc1-syzkaller-00236-gad8a69f361b9 #0 • https://git.kernel.org/stable/c/1c29fc4989bc2a3838b2837adc12b8aeb0feeede https://git.kernel.org/stable/c/d2346e6beb699909ca455d9d20c4e577ce900839 https://git.kernel.org/stable/c/ad8d39c7b437fcdab7208a6a56c093d222c008d5 https://git.kernel.org/stable/c/04cc361f029c14dd067ad180525c7392334c9bfd https://git.kernel.org/stable/c/8bc97117b51d68d5cea8f5351cca2d8c4153f394 https://git.kernel.org/stable/c/89f9f20b1cbd36d99d5a248a4bf8d11d4fd049a2 https://git.kernel.org/stable/c/f2ef4cb4d418fa64fe73eb84d10cc5c0e52e00fa https://git.kernel.org/stable/c/44bdb313da57322c9b3c108eb66981c6e • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') •
CVSS: -EPSS: 0%CPEs: 8EXPL: 0CVE-2023-52577 – dccp: fix dccp_v4_err()/dccp_v6_err() again
https://notcve.org/view.php?id=CVE-2023-52577
In the Linux kernel, the following vulnerability has been resolved: dccp: fix dccp_v4_err()/dccp_v6_err() again dh->dccph_x is the 9th byte (offset 8) in "struct dccp_hdr", not in the "byte 7" as Jann claimed. We need to make sure the ICMP messages are big enough, using more standard ways (no more assumptions). syzbot reported: BUG: KMSAN: uninit-value in pskb_may_pull_reason include/linux/skbuff.h:2667 [inline] BUG: KMSAN: uninit-value in pskb_may_pull include/linux/skbuff.h:2681 [inline] BUG: KMSAN: uninit-value in dccp_v6_err+0x426/0x1aa0 net/dccp/ipv6.c:94 pskb_may_pull_reason include/linux/skbuff.h:2667 [inline] pskb_may_pull include/linux/skbuff.h:2681 [inline] dccp_v6_err+0x426/0x1aa0 net/dccp/ipv6.c:94 icmpv6_notify+0x4c7/0x880 net/ipv6/icmp.c:867 icmpv6_rcv+0x19d5/0x30d0 ip6_protocol_deliver_rcu+0xda6/0x2a60 net/ipv6/ip6_input.c:438 ip6_input_finish net/ipv6/ip6_input.c:483 [inline] NF_HOOK include/linux/netfilter.h:304 [inline] ip6_input+0x15d/0x430 net/ipv6/ip6_input.c:492 ip6_mc_input+0xa7e/0xc80 net/ipv6/ip6_input.c:586 dst_input include/net/dst.h:468 [inline] ip6_rcv_finish+0x5db/0x870 net/ipv6/ip6_input.c:79 NF_HOOK include/linux/netfilter.h:304 [inline] ipv6_rcv+0xda/0x390 net/ipv6/ip6_input.c:310 __netif_receive_skb_one_core net/core/dev.c:5523 [inline] __netif_receive_skb+0x1a6/0x5a0 net/core/dev.c:5637 netif_receive_skb_internal net/core/dev.c:5723 [inline] netif_receive_skb+0x58/0x660 net/core/dev.c:5782 tun_rx_batched+0x83b/0x920 tun_get_user+0x564c/0x6940 drivers/net/tun.c:2002 tun_chr_write_iter+0x3af/0x5d0 drivers/net/tun.c:2048 call_write_iter include/linux/fs.h:1985 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x8ef/0x15c0 fs/read_write.c:584 ksys_write+0x20f/0x4c0 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __x64_sys_write+0x93/0xd0 fs/read_write.c:646 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Uninit was created at: slab_post_alloc_hook+0x12f/0xb70 mm/slab.h:767 slab_alloc_node mm/slub.c:3478 [inline] kmem_cache_alloc_node+0x577/0xa80 mm/slub.c:3523 kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:559 __alloc_skb+0x318/0x740 net/core/skbuff.c:650 alloc_skb include/linux/skbuff.h:1286 [inline] alloc_skb_with_frags+0xc8/0xbd0 net/core/skbuff.c:6313 sock_alloc_send_pskb+0xa80/0xbf0 net/core/sock.c:2795 tun_alloc_skb drivers/net/tun.c:1531 [inline] tun_get_user+0x23cf/0x6940 drivers/net/tun.c:1846 tun_chr_write_iter+0x3af/0x5d0 drivers/net/tun.c:2048 call_write_iter include/linux/fs.h:1985 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x8ef/0x15c0 fs/read_write.c:584 ksys_write+0x20f/0x4c0 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __x64_sys_write+0x93/0xd0 fs/read_write.c:646 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd CPU: 0 PID: 4995 Comm: syz-executor153 Not tainted 6.6.0-rc1-syzkaller-00014-ga747acc0b752 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023 En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: dccp: corrija dccp_v4_err()/dccp_v6_err() nuevamente dh->dccph_x es el noveno byte (desplazamiento 8) en "struct dccp_hdr", no en el "byte 7" como Jann reclamado. Necesitamos asegurarnos de que los mensajes ICMP sean lo suficientemente grandes, utilizando formas más estándar (sin más suposiciones). syzbot informó: ERROR: KMSAN: valor uninit en pskb_may_pull_reason include/linux/skbuff.h:2667 [en línea] ERROR: KMSAN: valor uninit en pskb_may_pull include/linux/skbuff.h:2681 [en línea] ERROR: KMSAN: uninit -valor en dccp_v6_err+0x426/0x1aa0 net/dccp/ipv6.c:94 pskb_may_pull_reason include/linux/skbuff.h:2667 [en línea] pskb_may_pull include/linux/skbuff.h:2681 [en línea] dccp_v6_err+0x426/0x1aa0 net/ dccp/ipv6.c:94 icmpv6_notify+0x4c7/0x880 net/ipv6/icmp.c:867 icmpv6_rcv+0x19d5/0x30d0 ip6_protocol_deliver_rcu+0xda6/0x2a60 net/ipv6/ip6_input.c:438 ip6_input_finish net/ipv6 /ip6_input.c:483 [en línea] NF_HOOK include/linux/netfilter.h:304 [en línea] ip6_input+0x15d/0x430 net/ipv6/ip6_input.c:492 ip6_mc_input+0xa7e/0xc80 net/ipv6/ip6_input.c:586 dst_input include/net/dst .h:468 [en línea] ip6_rcv_finish+0x5db/0x870 net/ipv6/ip6_input.c:79 NF_HOOK include/linux/netfilter.h:304 [en línea] ipv6_rcv+0xda/0x390 net/ipv6/ip6_input.c:310 __netif_receive_skb_one_core net /core/dev.c:5523 [en línea] __netif_receive_skb+0x1a6/0x5a0 net/core/dev.c:5637 netif_receive_skb_internal net/core/dev.c:5723 [en línea] netif_receive_skb+0x58/0x660 net/core/dev.c :5782 tun_rx_batched+0x83b/0x920 tun_get_user+0x564c/0x6940 drivers/net/tun.c:2002 tun_chr_write_iter+0x3af/0x5d0 drivers/net/tun.c:2048 call_write_iter include/linux/fs.h:1985 [en línea] new_sync_write fs /read_write.c:491 [en línea] vfs_write+0x8ef/0x15c0 fs/read_write.c:584 ksys_write+0x20f/0x4c0 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [en línea] __se_sys_write fs/read_write.c :646 [en línea] __x64_sys_write+0x93/0xd0 fs/read_write.c:646 do_syscall_x64 arch/x86/entry/common.c:50 [en línea] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 Entry_SYSCALL_64_after_hwframe+ 0x63/0xcd Uninit se creó en: slab_post_alloc_hook+0x12f/0xb70 mm/slab.h:767 slab_alloc_node mm/slub.c:3478 [en línea] kmem_cache_alloc_node+0x577/0xa80 mm/slub.c:3523 kmalloc_reserve+0x13d/0x4 a0 neto/ core/skbuff.c:559 __alloc_skb+0x318/0x740 net/core/skbuff.c:650 alloc_skb include/linux/skbuff.h:1286 [en línea] alloc_skb_with_frags+0xc8/0xbd0 net/core/skbuff.c:6313 sock_alloc_send_pskb+ 0xa80/0xbf0 net/core/sock.c:2795 controladores tun_alloc_skb/net/tun.c:1531 [en línea] tun_get_user+0x23cf/0x6940 controladores/net/tun.c:1846 tun_chr_write_iter+0x3af/0x5d0 controladores/net/tun. c:2048 call_write_iter include/linux/fs.h:1985 [en línea] new_sync_write fs/read_write.c:491 [en línea] vfs_write+0x8ef/0x15c0 fs/read_write.c:584 ksys_write+0x20f/0x4c0 fs/read_write.c: 637 __do_sys_write fs/read_write.c:649 [en línea] __se_sys_write fs/read_write.c:646 [en línea] __x64_sys_write+0x93/0xd0 fs/read_write.c:646 do_syscall_x64 arch/x86/entry/common.c:50 [en línea] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd CPU: 0 PID: 4995 Comm: syz-executor153 Not tainted 6.6.0-rc1-syzkaller-00014-ga747acc0b752 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/08/2023 • https://git.kernel.org/stable/c/3533e10272555c422a7d51ebc0ce8c483429f7f2 https://git.kernel.org/stable/c/177212bf6dc1ff2d13d0409cddc5c9e81feec63d https://git.kernel.org/stable/c/7a7dd70cb954d3efa706a429687ded88c02496fa https://git.kernel.org/stable/c/4b8a938e329ae4eb54b73b0c87b5170607b038a8 https://git.kernel.org/stable/c/6ecf09699eb1554299aa1e7fd13e9e80f656c2f9 https://git.kernel.org/stable/c/f8a7f10a1dccf9868ff09342a73dce27501b86df https://git.kernel.org/stable/c/ec620c34f5fa5d055f9f6136a387755db6157712 https://git.kernel.org/stable/c/d8171411a661253e6271fa10b65b46daf •
CVSS: 5.5EPSS: 0%CPEs: 3EXPL: 0CVE-2023-52576 – x86/mm, kexec, ima: Use memblock_free_late() from ima_free_kexec_buffer()
https://notcve.org/view.php?id=CVE-2023-52576
In the Linux kernel, the following vulnerability has been resolved: x86/mm, kexec, ima: Use memblock_free_late() from ima_free_kexec_buffer() The code calling ima_free_kexec_buffer() runs long after the memblock allocator has already been torn down, potentially resulting in a use after free in memblock_isolate_range(). With KASAN or KFENCE, this use after free will result in a BUG from the idle task, and a subsequent kernel panic. Switch ima_free_kexec_buffer() over to memblock_free_late() to avoid that bug. • https://git.kernel.org/stable/c/fee3ff99bc67604fba77f19da0106f3ec52b1956 https://git.kernel.org/stable/c/eef16bfdb212da60f5144689f2967fb25b051a2b https://git.kernel.org/stable/c/d2dfbc0e3b7a04c2d941421a958dc31c897fb204 https://git.kernel.org/stable/c/34cf99c250d5cd2530b93a57b0de31d3aaf8685b • CWE-416: Use After Free •