CVSS: -EPSS: 0%CPEs: 8EXPL: 0CVE-2024-56658 – net: defer final 'struct net' free in netns dismantle
https://notcve.org/view.php?id=CVE-2024-56658
In the Linux kernel, the following vulnerability has been resolved: net: defer final 'struct net' free in netns dismantle Ilya reported a slab-use-after-free in dst_destroy [1] Issue is in xfrm6_net_init() and xfrm4_net_init() : They copy xfrm[46]_dst_ops_template into net->xfrm.xfrm[46]_dst_ops. But net structure might be freed before all the dst callbacks are called. So when dst_destroy() calls later : if (dst->ops->destroy) dst->ops->destroy(dst); dst->ops points to the old net->xfrm.xfrm[46]_dst_ops, which has been freed. See a relevant issue fixed in : ac888d58869b ("net: do not delay dst_entries_add() in dst_release()") A fix is to queue the 'struct net' to be freed after one another cleanup_net() round (and existing rcu_barrier()) [1] BUG: KASAN: slab-use-after-free in dst_destroy (net/core/dst.c:112) Read of size 8 at addr ffff8882137ccab0 by task swapper/37/0 Dec 03 05:46:18 kernel: CPU: 37 UID: 0 PID: 0 Comm: swapper/37 Kdump: loaded Not tainted 6.12.0 #67 Hardware name: Red Hat KVM/RHEL, BIOS 1.16.1-1.el9 04/01/2014 Call Trace: <IRQ> dump_stack_lvl (lib/dump_stack.c:124) print_address_description.constprop.0 (mm/kasan/report.c:378) ? dst_destroy (net/core/dst.c:112) print_report (mm/kasan/report.c:489) ? dst_destroy (net/core/dst.c:112) ? kasan_addr_to_slab (mm/kasan/common.c:37) kasan_report (mm/kasan/report.c:603) ? • https://git.kernel.org/stable/c/a8a572a6b5f2a79280d6e302cb3c1cb1fbaeb3e8 https://git.kernel.org/stable/c/3e29fa5b742479f73400468314a1c6b9cf553ee4 https://git.kernel.org/stable/c/ce43f6a650a6689551a217276fb0dcca33790425 https://git.kernel.org/stable/c/eeca98948d8c4922e6deb16bfc9ee0bd9902dbb0 https://git.kernel.org/stable/c/1bd631fc9a4515878c1bb7effd19335d2f2d87c2 https://git.kernel.org/stable/c/3267b254dc0a04dfa362a2be24573cfa6d2d78f5 https://git.kernel.org/stable/c/b7a79e51297f7b82adb687086f5cb2da446f1e40 https://git.kernel.org/stable/c/6610c7f8a8d47fd1123eed55ba8c11c24 •
CVSS: -EPSS: 0%CPEs: 7EXPL: 0CVE-2024-56650 – netfilter: x_tables: fix LED ID check in led_tg_check()
https://notcve.org/view.php?id=CVE-2024-56650
In the Linux kernel, the following vulnerability has been resolved: netfilter: x_tables: fix LED ID check in led_tg_check() Syzbot has reported the following BUG detected by KASAN: BUG: KASAN: slab-out-of-bounds in strlen+0x58/0x70 Read of size 1 at addr ffff8881022da0c8 by task repro/5879 ... Call Trace: <TASK> dump_stack_lvl+0x241/0x360 ? __pfx_dump_stack_lvl+0x10/0x10 ? __pfx__printk+0x10/0x10 ? _printk+0xd5/0x120 ? __virt_addr_valid+0x183/0x530 ? • https://git.kernel.org/stable/c/268cb38e1802db560c73167e643f14a3dcb4b07c https://git.kernel.org/stable/c/147a42bb02de8735cb08476be6d0917987d022c2 https://git.kernel.org/stable/c/ad28612ebae1fcc1104bd432e99e99d87f6bfe09 https://git.kernel.org/stable/c/36a9d94dac28beef6b8abba46ba8874320d3e800 https://git.kernel.org/stable/c/ab9916321c95f5280b72b4c5055e269f98627efe https://git.kernel.org/stable/c/a9bcc0b70d9baf3ff005874489a0dc9d023b54c3 https://git.kernel.org/stable/c/c40c96d98e536fc1daaa125c2332b988615e30a4 https://git.kernel.org/stable/c/04317f4eb2aad312ad85c1a17ad81fe75 •
CVSS: -EPSS: 0%CPEs: 2EXPL: 0CVE-2024-56647 – net: Fix icmp host relookup triggering ip_rt_bug
https://notcve.org/view.php?id=CVE-2024-56647
In the Linux kernel, the following vulnerability has been resolved: net: Fix icmp host relookup triggering ip_rt_bug arp link failure may trigger ip_rt_bug while xfrm enabled, call trace is: WARNING: CPU: 0 PID: 0 at net/ipv4/route.c:1241 ip_rt_bug+0x14/0x20 Modules linked in: CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.12.0-rc6-00077-g2e1b3cc9d7f7 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014 RIP: 0010:ip_rt_bug+0x14/0x20 Call Trace: <IRQ> ip_send_skb+0x14/0x40 __icmp_send+0x42d/0x6a0 ipv4_link_failure+0xe2/0x1d0 arp_error_report+0x3c/0x50 neigh_invalidate+0x8d/0x100 neigh_timer_handler+0x2e1/0x330 call_timer_fn+0x21/0x120 __run_timer_base.part.0+0x1c9/0x270 run_timer_softirq+0x4c/0x80 handle_softirqs+0xac/0x280 irq_exit_rcu+0x62/0x80 sysvec_apic_timer_interrupt+0x77/0x90 The script below reproduces this scenario: ip xfrm policy add src 0.0.0.0/0 dst 0.0.0.0/0 \ dir out priority 0 ptype main flag localok icmp ip l a veth1 type veth ip a a 192.168.141.111/24 dev veth0 ip l s veth0 up ping 192.168.141.155 -c 1 icmp_route_lookup() create input routes for locally generated packets while xfrm relookup ICMP traffic.Then it will set input route (dst->out = ip_rt_bug) to skb for DESTUNREACH. For ICMP err triggered by locally generated packets, dst->dev of output route is loopback. Generally, xfrm relookup verification is not required on loopback interfaces (net.ipv4.conf.lo.disable_xfrm = 1). Skip icmp relookup for locally generated packets to fix it. • https://git.kernel.org/stable/c/8b7817f3a959ed99d7443afc12f78a7e1fcc2063 https://git.kernel.org/stable/c/9545011e7b2a8fc0cbd6e387a09f12cd41d7d82f https://git.kernel.org/stable/c/c44daa7e3c73229f7ac74985acb8c7fb909c4e0a •
CVSS: -EPSS: 0%CPEs: 8EXPL: 0CVE-2024-56644 – net/ipv6: release expired exception dst cached in socket
https://notcve.org/view.php?id=CVE-2024-56644
In the Linux kernel, the following vulnerability has been resolved: net/ipv6: release expired exception dst cached in socket Dst objects get leaked in ip6_negative_advice() when this function is executed for an expired IPv6 route located in the exception table. There are several conditions that must be fulfilled for the leak to occur: * an ICMPv6 packet indicating a change of the MTU for the path is received, resulting in an exception dst being created * a TCP connection that uses the exception dst for routing packets must start timing out so that TCP begins retransmissions * after the exception dst expires, the FIB6 garbage collector must not run before TCP executes ip6_negative_advice() for the expired exception dst When TCP executes ip6_negative_advice() for an exception dst that has expired and if no other socket holds a reference to the exception dst, the refcount of the exception dst is 2, which corresponds to the increment made by dst_init() and the increment made by the TCP socket for which the connection is timing out. The refcount made by the socket is never released. The refcount of the dst is decremented in sk_dst_reset() but that decrement is counteracted by a dst_hold() intentionally placed just before the sk_dst_reset() in ip6_negative_advice(). After ip6_negative_advice() has finished, there is no other object tied to the dst. • https://git.kernel.org/stable/c/54c1a859efd9fd6cda05bc700315ba2519c14eba https://git.kernel.org/stable/c/9c93e9c757c7d3d96027a06b9b4c4e37ca87ded7 https://git.kernel.org/stable/c/a95808252e8acc0123bacd2dff8b9af10bc145b7 https://git.kernel.org/stable/c/b90d061345bb8cd51fece561a800bae1c95448a6 https://git.kernel.org/stable/c/0b8903e6c881f72c6849d4952de742c656eb5ab9 https://git.kernel.org/stable/c/535add1e9f274502209cb997801208bbe1ae6c6f https://git.kernel.org/stable/c/f43d12fd0fa8ee5b9caf8a3927e10d06431764d2 https://git.kernel.org/stable/c/8b591bd522b71c42a82898290e35d32b4 •
CVSS: -EPSS: 0%CPEs: 7EXPL: 0CVE-2024-56643 – dccp: Fix memory leak in dccp_feat_change_recv
https://notcve.org/view.php?id=CVE-2024-56643
In the Linux kernel, the following vulnerability has been resolved: dccp: Fix memory leak in dccp_feat_change_recv If dccp_feat_push_confirm() fails after new value for SP feature was accepted without reconciliation ('entry == NULL' branch), memory allocated for that value with dccp_feat_clone_sp_val() is never freed. Here is the kmemleak stack for this: unreferenced object 0xffff88801d4ab488 (size 8): comm "syz-executor310", pid 1127, jiffies 4295085598 (age 41.666s) hex dump (first 8 bytes): 01 b4 4a 1d 80 88 ff ff ..J..... backtrace: [<00000000db7cabfe>] kmemdup+0x23/0x50 mm/util.c:128 [<0000000019b38405>] kmemdup include/linux/string.h:465 [inline] [<0000000019b38405>] dccp_feat_clone_sp_val net/dccp/feat.c:371 [inline] [<0000000019b38405>] dccp_feat_clone_sp_val net/dccp/feat.c:367 [inline] [<0000000019b38405>] dccp_feat_change_recv net/dccp/feat.c:1145 [inline] [<0000000019b38405>] dccp_feat_parse_options+0x1196/0x2180 net/dccp/feat.c:1416 [<00000000b1f6d94a>] dccp_parse_options+0xa2a/0x1260 net/dccp/options.c:125 [<0000000030d7b621>] dccp_rcv_state_process+0x197/0x13d0 net/dccp/input.c:650 [<000000001f74c72e>] dccp_v4_do_rcv+0xf9/0x1a0 net/dccp/ipv4.c:688 [<00000000a6c24128>] sk_backlog_rcv include/net/sock.h:1041 [inline] [<00000000a6c24128>] __release_sock+0x139/0x3b0 net/core/sock.c:2570 [<00000000cf1f3a53>] release_sock+0x54/0x1b0 net/core/sock.c:3111 [<000000008422fa23>] inet_wait_for_connect net/ipv4/af_inet.c:603 [inline] [<000000008422fa23>] __inet_stream_connect+0x5d0/0xf70 net/ipv4/af_inet.c:696 [<0000000015b6f64d>] inet_stream_connect+0x53/0xa0 net/ipv4/af_inet.c:735 [<0000000010122488>] __sys_connect_file+0x15c/0x1a0 net/socket.c:1865 [<00000000b4b70023>] __sys_connect+0x165/0x1a0 net/socket.c:1882 [<00000000f4cb3815>] __do_sys_connect net/socket.c:1892 [inline] [<00000000f4cb3815>] __se_sys_connect net/socket.c:1889 [inline] [<00000000f4cb3815>] __x64_sys_connect+0x6e/0xb0 net/socket.c:1889 [<00000000e7b1e839>] do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 [<0000000055e91434>] entry_SYSCALL_64_after_hwframe+0x67/0xd1 Clean up the allocated memory in case of dccp_feat_push_confirm() failure and bail out with an error reset code. Found by Linux Verification Center (linuxtesting.org) with Syzkaller. • https://git.kernel.org/stable/c/e77b8363b2ea7c0d89919547c1a8b0562f298b57 https://git.kernel.org/stable/c/623be080ab3c13d71570bd32f7202a8efa8e2252 https://git.kernel.org/stable/c/c99507fff94b926fc92279c92d80f229c91cb85d https://git.kernel.org/stable/c/bc3d4423def1a9412a0ae454cb4477089ab79276 https://git.kernel.org/stable/c/6ff67909ee2ffad911e3122616df41dee23ff4f6 https://git.kernel.org/stable/c/d3ec686a369fae5034303061f003cd3f94ddfd23 https://git.kernel.org/stable/c/9ee68b0f23706a77f53c832457b9384178b76421 https://git.kernel.org/stable/c/22be4727a8f898442066bcac34f8a1ad0 •