CVE-2021-47146
Linux kernel MLD: High Order Page Allocation Required
Description
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 ? ip6_mc_hdr.isra.26.constprop.46+0x600/0x600 ? lock_contended+0xc40/0xc40 add_grhead.isra.33+0x280/0x380 add_grec+0x5ca/0xff0 ? mld_sendpack+0xf40/0xf40 ? lock_downgrade+0x690/0x690 mld_send_initial_cr.part.34+0xb9/0x180 ipv6_mc_dad_complete+0x15d/0x1b0 addrconf_dad_completed+0x8d2/0xbb0 ? lock_downgrade+0x690/0x690 ? addrconf_rs_timer+0x660/0x660 ? addrconf_dad_work+0x73c/0x10e0 addrconf_dad_work+0x73c/0x10e0 Allowing high order page allocation could fix this problem.
INFO
Published Date :
March 25, 2024, 9:15 a.m.
Last Modified :
Dec. 20, 2024, 1:56 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
1.8
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-47146.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2021-47146 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47146 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Dec. 20, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE NIST NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 2.6.35 up to (excluding) 4.4.271 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.5 up to (excluding) 4.9.271 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.10 up to (excluding) 4.14.235 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.15 up to (excluding) 4.19.193 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 up to (excluding) 5.4.124 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.42 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.12.9 *cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.13:rc3:*:*:*:*:*:* Changed Reference Type https://git.kernel.org/stable/c/020ef930b826d21c5446fdc9db80fd72a791bc21 No Types Assigned https://git.kernel.org/stable/c/020ef930b826d21c5446fdc9db80fd72a791bc21 Patch Changed Reference Type https://git.kernel.org/stable/c/020ef930b826d21c5446fdc9db80fd72a791bc21 No Types Assigned https://git.kernel.org/stable/c/020ef930b826d21c5446fdc9db80fd72a791bc21 Patch Changed Reference Type https://git.kernel.org/stable/c/0e35b7457b7b6e73ffeaaca1a577fdf1af0feca1 No Types Assigned https://git.kernel.org/stable/c/0e35b7457b7b6e73ffeaaca1a577fdf1af0feca1 Patch Changed Reference Type https://git.kernel.org/stable/c/0e35b7457b7b6e73ffeaaca1a577fdf1af0feca1 No Types Assigned https://git.kernel.org/stable/c/0e35b7457b7b6e73ffeaaca1a577fdf1af0feca1 Patch Changed Reference Type https://git.kernel.org/stable/c/17728616a4c85baf0edc975c60ba4e4157684d9a No Types Assigned https://git.kernel.org/stable/c/17728616a4c85baf0edc975c60ba4e4157684d9a Patch Changed Reference Type https://git.kernel.org/stable/c/17728616a4c85baf0edc975c60ba4e4157684d9a No Types Assigned https://git.kernel.org/stable/c/17728616a4c85baf0edc975c60ba4e4157684d9a Patch Changed Reference Type https://git.kernel.org/stable/c/221142038f36d9f28b64e83e954774da4d4ccd17 No Types Assigned https://git.kernel.org/stable/c/221142038f36d9f28b64e83e954774da4d4ccd17 Patch Changed Reference Type https://git.kernel.org/stable/c/221142038f36d9f28b64e83e954774da4d4ccd17 No Types Assigned https://git.kernel.org/stable/c/221142038f36d9f28b64e83e954774da4d4ccd17 Patch Changed Reference Type https://git.kernel.org/stable/c/37d697759958d111439080bab7e14d2b0e7b39f5 No Types Assigned https://git.kernel.org/stable/c/37d697759958d111439080bab7e14d2b0e7b39f5 Patch Changed Reference Type https://git.kernel.org/stable/c/37d697759958d111439080bab7e14d2b0e7b39f5 No Types Assigned https://git.kernel.org/stable/c/37d697759958d111439080bab7e14d2b0e7b39f5 Patch Changed Reference Type https://git.kernel.org/stable/c/4b77ad9097067b31237eeeee0bf70f80849680a0 No Types Assigned https://git.kernel.org/stable/c/4b77ad9097067b31237eeeee0bf70f80849680a0 Patch Changed Reference Type https://git.kernel.org/stable/c/4b77ad9097067b31237eeeee0bf70f80849680a0 No Types Assigned https://git.kernel.org/stable/c/4b77ad9097067b31237eeeee0bf70f80849680a0 Patch Changed Reference Type https://git.kernel.org/stable/c/a76fb9ba545289379acf409653ad5f74417be59c No Types Assigned https://git.kernel.org/stable/c/a76fb9ba545289379acf409653ad5f74417be59c Patch Changed Reference Type https://git.kernel.org/stable/c/a76fb9ba545289379acf409653ad5f74417be59c No Types Assigned https://git.kernel.org/stable/c/a76fb9ba545289379acf409653ad5f74417be59c Patch Changed Reference Type https://git.kernel.org/stable/c/beb39adb150f8f3b516ddf7c39835a9788704d23 No Types Assigned https://git.kernel.org/stable/c/beb39adb150f8f3b516ddf7c39835a9788704d23 Patch Changed Reference Type https://git.kernel.org/stable/c/beb39adb150f8f3b516ddf7c39835a9788704d23 No Types Assigned https://git.kernel.org/stable/c/beb39adb150f8f3b516ddf7c39835a9788704d23 Patch -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/020ef930b826d21c5446fdc9db80fd72a791bc21 Added Reference https://git.kernel.org/stable/c/0e35b7457b7b6e73ffeaaca1a577fdf1af0feca1 Added Reference https://git.kernel.org/stable/c/17728616a4c85baf0edc975c60ba4e4157684d9a Added Reference https://git.kernel.org/stable/c/221142038f36d9f28b64e83e954774da4d4ccd17 Added Reference https://git.kernel.org/stable/c/37d697759958d111439080bab7e14d2b0e7b39f5 Added Reference https://git.kernel.org/stable/c/4b77ad9097067b31237eeeee0bf70f80849680a0 Added Reference https://git.kernel.org/stable/c/a76fb9ba545289379acf409653ad5f74417be59c Added Reference https://git.kernel.org/stable/c/beb39adb150f8f3b516ddf7c39835a9788704d23 -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 28, 2024
Action Type Old Value New Value -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 14, 2024
Action Type Old Value New Value -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Mar. 25, 2024
Action Type Old Value New Value Added Description 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 ? ip6_mc_hdr.isra.26.constprop.46+0x600/0x600 ? lock_contended+0xc40/0xc40 add_grhead.isra.33+0x280/0x380 add_grec+0x5ca/0xff0 ? mld_sendpack+0xf40/0xf40 ? lock_downgrade+0x690/0x690 mld_send_initial_cr.part.34+0xb9/0x180 ipv6_mc_dad_complete+0x15d/0x1b0 addrconf_dad_completed+0x8d2/0xbb0 ? lock_downgrade+0x690/0x690 ? addrconf_rs_timer+0x660/0x660 ? addrconf_dad_work+0x73c/0x10e0 addrconf_dad_work+0x73c/0x10e0 Allowing high order page allocation could fix this problem. Added Reference kernel.org https://git.kernel.org/stable/c/0e35b7457b7b6e73ffeaaca1a577fdf1af0feca1 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/17728616a4c85baf0edc975c60ba4e4157684d9a [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/221142038f36d9f28b64e83e954774da4d4ccd17 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/4b77ad9097067b31237eeeee0bf70f80849680a0 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/37d697759958d111439080bab7e14d2b0e7b39f5 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/beb39adb150f8f3b516ddf7c39835a9788704d23 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/a76fb9ba545289379acf409653ad5f74417be59c [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/020ef930b826d21c5446fdc9db80fd72a791bc21 [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-47146 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-47146
weaknesses.