CVSS: -EPSS: 0%CPEs: 10EXPL: 0CVE-2021-47162 – tipc: skb_linearize the head skb when reassembling msgs
https://notcve.org/view.php?id=CVE-2021-47162
In the Linux kernel, the following vulnerability has been resolved: tipc: skb_linearize the head skb when reassembling msgs It's not a good idea to append the frag skb to a skb's frag_list if the frag_list already has skbs from elsewhere, such as this skb was created by pskb_copy() where the frag_list was cloned (all the skbs in it were skb_get'ed) and shared by multiple skbs. However, the new appended frag skb should have been only seen by the current skb. Otherwise, it will cause use after free crashes as this appended frag skb are seen by multiple skbs but it only got skb_get called once. The same thing happens with a skb updated by pskb_may_pull() with a skb_cloned skb. Li Shuang has reported quite a few crashes caused by this when doing testing over macvlan devices: [] kernel BUG at net/core/skbuff.c:1970! [] Call Trace: [] skb_clone+0x4d/0xb0 [] macvlan_broadcast+0xd8/0x160 [macvlan] [] macvlan_process_broadcast+0x148/0x150 [macvlan] [] process_one_work+0x1a7/0x360 [] worker_thread+0x30/0x390 [] kernel BUG at mm/usercopy.c:102! [] Call Trace: [] __check_heap_object+0xd3/0x100 [] __check_object_size+0xff/0x16b [] simple_copy_to_iter+0x1c/0x30 [] __skb_datagram_iter+0x7d/0x310 [] __skb_datagram_iter+0x2a5/0x310 [] skb_copy_datagram_iter+0x3b/0x90 [] tipc_recvmsg+0x14a/0x3a0 [tipc] [] ____sys_recvmsg+0x91/0x150 [] ___sys_recvmsg+0x7b/0xc0 [] kernel BUG at mm/slub.c:305! • https://git.kernel.org/stable/c/45c8b7b175ceb2d542e0fe15247377bf3bce29ec https://git.kernel.org/stable/c/d45ed6c1ff20d3640a31f03816ca2d48fb7d6f22 https://git.kernel.org/stable/c/c19282fd54a19e4651a4e67836cd842082546677 https://git.kernel.org/stable/c/b2c8d28c34b3070407cb1741f9ba3f15d0284b8b https://git.kernel.org/stable/c/5489f30bb78ff0dafb4229a69632afc2ba20765c https://git.kernel.org/stable/c/436d650d374329a591c30339a91fa5078052ed1e https://git.kernel.org/stable/c/4b1761898861117c97066aea6c58f68a7787f0bf https://git.kernel.org/stable/c/64d17ec9f1ded042c4b188d15734f3348 •
CVSS: 6.0EPSS: 0%CPEs: 8EXPL: 0CVE-2021-47153 – i2c: i801: Don't generate an interrupt on bus reset
https://notcve.org/view.php?id=CVE-2021-47153
In the Linux kernel, the following vulnerability has been resolved: i2c: i801: Don't generate an interrupt on bus reset Now that the i2c-i801 driver supports interrupts, setting the KILL bit in a attempt to recover from a timed out transaction triggers an interrupt. Unfortunately, the interrupt handler (i801_isr) is not prepared for this situation and will try to process the interrupt as if it was signaling the end of a successful transaction. In the case of a block transaction, this can result in an out-of-range memory access. This condition was reproduced several times by syzbot: https://syzkaller.appspot.com/bug?extid=ed71512d469895b5b34e https://syzkaller.appspot.com/bug?extid=8c8dedc0ba9e03f6c79e https://syzkaller.appspot.com/bug? • https://git.kernel.org/stable/c/636752bcb5177a301d0266270661581de8624828 https://git.kernel.org/stable/c/f9469082126cebb7337db3992d143f5e4edfe629 https://git.kernel.org/stable/c/09c9e79f4c10cfb6b9e0e1b4dd355232e4b5a3b3 https://git.kernel.org/stable/c/dfa8929e117b0228a7765f5c3f5988a4a028f3c6 https://git.kernel.org/stable/c/c70e1ba2e7e65255a0ce004f531dd90dada97a8c https://git.kernel.org/stable/c/04cc05e3716ae31b17ecdab7bc55c8170def1b8b https://git.kernel.org/stable/c/b523feb7e8e44652f92f3babb953a976e7ccbbef https://git.kernel.org/stable/c/1f583d3813f204449037cd2acbfc09168 • CWE-125: Out-of-bounds Read •
CVSS: -EPSS: 0%CPEs: 5EXPL: 0CVE-2021-47150 – net: fec: fix the potential memory leak in fec_enet_init()
https://notcve.org/view.php?id=CVE-2021-47150
In the Linux kernel, the following vulnerability has been resolved: net: fec: fix the potential memory leak in fec_enet_init() If the memory allocated for cbd_base is failed, it should free the memory allocated for the queues, otherwise it causes memory leak. And if the memory allocated for the queues is failed, it can return error directly. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: fec: soluciona la posible pérdida de memoria en fec_enet_init() Si la memoria asignada para cbd_base falla, debería liberar la memoria asignada para las colas; de lo contrario, provoca una pérdida de memoria. Y si falla la memoria asignada para las colas, puede devolver un error directamente. • https://git.kernel.org/stable/c/59d0f746564495c7f54526674deabfcf101236a1 https://git.kernel.org/stable/c/15102886bc8f5f29daaadf2d925591d564c17e9f https://git.kernel.org/stable/c/20255d41ac560397b6a07d8d87dcc5e2efc7672a https://git.kernel.org/stable/c/8ee7ef4a57a9e1228b6f345aaa70aa8951c7e9cd https://git.kernel.org/stable/c/32a1777fd113335c3f70dc445dffee0ad1c6870f https://git.kernel.org/stable/c/619fee9eb13b5d29e4267cb394645608088c28a8 •
CVSS: -EPSS: 0%CPEs: 8EXPL: 0CVE-2021-47149 – net: fujitsu: fix potential null-ptr-deref
https://notcve.org/view.php?id=CVE-2021-47149
In the Linux kernel, the following vulnerability has been resolved: net: fujitsu: fix potential null-ptr-deref In fmvj18x_get_hwinfo(), if ioremap fails there will be NULL pointer deref. To fix this, check the return value of ioremap and return -1 to the caller in case of failure. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: fujitsu: corrige el potencial null-ptr-deref En fmvj18x_get_hwinfo(), si ioremap falla, habrá un puntero NULL deref. Para solucionar este problema, verifique el valor de retorno de ioremap y devuelva -1 a la persona que llama en caso de falla. • https://git.kernel.org/stable/c/b92170e209f7746ed72eaac98f2c2f4b9af734e6 https://git.kernel.org/stable/c/6dbf1101594f7c76990b63c35b5a40205a914b6b https://git.kernel.org/stable/c/c4f1c23edbe921ab2ecd6140d700e756cd44c5f7 https://git.kernel.org/stable/c/7883d3895d0fbb0ba9bff0f8665f99974b45210f https://git.kernel.org/stable/c/22049c3d40f08facd1867548716a484dad6b3251 https://git.kernel.org/stable/c/71723a796ab7881f491d663c6cd94b29be5fba50 https://git.kernel.org/stable/c/f14bf57a08779a5dee9936f63ada0149ea89c5e6 https://git.kernel.org/stable/c/52202be1cd996cde6e8969a128dc27ee4 •
CVSS: -EPSS: 0%CPEs: 8EXPL: 0CVE-2021-47146 – mld: fix panic in mld_newpack()
https://notcve.org/view.php?id=CVE-2021-47146
In the Linux kernel, the following vulnerability has been resolved: mld: fix panic in mld_newpack() mld_newpack() doesn't allow to allocate high order page, only order-0 allocation is allowed. If headroom size is too large, a kernel panic could occur in skb_put(). Test commands: ip netns del A ip netns del B ip netns add A ip netns add B ip link add veth0 type veth peer name veth1 ip link set veth0 netns A ip link set veth1 netns B ip netns exec A ip link set lo up ip netns exec A ip link set veth0 up ip netns exec A ip -6 a a 2001:db8:0::1/64 dev veth0 ip netns exec B ip link set lo up ip netns exec B ip link set veth1 up ip netns exec B ip -6 a a 2001:db8:0::2/64 dev veth1 for i in {1..99} do let A=$i-1 ip netns exec A ip link add ip6gre$i type ip6gre \ local 2001:db8:$A::1 remote 2001:db8:$A::2 encaplimit 100 ip netns exec A ip -6 a a 2001:db8:$i::1/64 dev ip6gre$i ip netns exec A ip link set ip6gre$i up ip netns exec B ip link add ip6gre$i type ip6gre \ local 2001:db8:$A::2 remote 2001:db8:$A::1 encaplimit 100 ip netns exec B ip -6 a a 2001:db8:$i::2/64 dev ip6gre$i ip netns exec B ip link set ip6gre$i up done Splat looks like: kernel BUG at net/core/skbuff.c:110! invalid opcode: 0000 [#1] SMP DEBUG_PAGEALLOC KASAN PTI CPU: 0 PID: 7 Comm: kworker/0:1 Not tainted 5.12.0+ #891 Workqueue: ipv6_addrconf addrconf_dad_work RIP: 0010:skb_panic+0x15d/0x15f Code: 92 fe 4c 8b 4c 24 10 53 8b 4d 70 45 89 e0 48 c7 c7 00 ae 79 83 41 57 41 56 41 55 48 8b 54 24 a6 26 f9 ff <0f> 0b 48 8b 6c 24 20 89 34 24 e8 4a 4e 92 fe 8b 34 24 48 c7 c1 20 RSP: 0018:ffff88810091f820 EFLAGS: 00010282 RAX: 0000000000000089 RBX: ffff8881086e9000 RCX: 0000000000000000 RDX: 0000000000000089 RSI: 0000000000000008 RDI: ffffed1020123efb RBP: ffff888005f6eac0 R08: ffffed1022fc0031 R09: ffffed1022fc0031 R10: ffff888117e00187 R11: ffffed1022fc0030 R12: 0000000000000028 R13: ffff888008284eb0 R14: 0000000000000ed8 R15: 0000000000000ec0 FS: 0000000000000000(0000) GS:ffff888117c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8b801c5640 CR3: 0000000033c2c006 CR4: 00000000003706f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ? ip6_mc_hdr.isra.26.constprop.46+0x12a/0x600 ? ip6_mc_hdr.isra.26.constprop.46+0x12a/0x600 skb_put.cold.104+0x22/0x22 ip6_mc_hdr.isra.26.constprop.46+0x12a/0x600 ? rcu_read_lock_sched_held+0x91/0xc0 mld_newpack+0x398/0x8f0 ? • https://git.kernel.org/stable/c/72e09ad107e78d69ff4d3b97a69f0aad2b77280f https://git.kernel.org/stable/c/0e35b7457b7b6e73ffeaaca1a577fdf1af0feca1 https://git.kernel.org/stable/c/17728616a4c85baf0edc975c60ba4e4157684d9a https://git.kernel.org/stable/c/221142038f36d9f28b64e83e954774da4d4ccd17 https://git.kernel.org/stable/c/4b77ad9097067b31237eeeee0bf70f80849680a0 https://git.kernel.org/stable/c/37d697759958d111439080bab7e14d2b0e7b39f5 https://git.kernel.org/stable/c/beb39adb150f8f3b516ddf7c39835a9788704d23 https://git.kernel.org/stable/c/a76fb9ba545289379acf409653ad5f744 •