{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2021-47146", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-03-04T18:12:48.845Z", "datePublished": "2024-03-25T09:07:43.043Z", "dateUpdated": "2026-05-11T13:48:55.352Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T13:48:55.352Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmld: fix panic in mld_newpack()\n\nmld_newpack() doesn't allow to allocate high order page,\nonly order-0 allocation is allowed.\nIf headroom size is too large, a kernel panic could occur in skb_put().\n\nTest commands:\n ip netns del A\n ip netns del B\n ip netns add A\n ip netns add B\n ip link add veth0 type veth peer name veth1\n ip link set veth0 netns A\n ip link set veth1 netns B\n\n ip netns exec A ip link set lo up\n ip netns exec A ip link set veth0 up\n ip netns exec A ip -6 a a 2001:db8:0::1/64 dev veth0\n ip netns exec B ip link set lo up\n ip netns exec B ip link set veth1 up\n ip netns exec B ip -6 a a 2001:db8:0::2/64 dev veth1\n for i in {1..99}\n do\n let A=$i-1\n ip netns exec A ip link add ip6gre$i type ip6gre \\\n\tlocal 2001:db8:$A::1 remote 2001:db8:$A::2 encaplimit 100\n ip netns exec A ip -6 a a 2001:db8:$i::1/64 dev ip6gre$i\n ip netns exec A ip link set ip6gre$i up\n\n ip netns exec B ip link add ip6gre$i type ip6gre \\\n\tlocal 2001:db8:$A::2 remote 2001:db8:$A::1 encaplimit 100\n ip netns exec B ip -6 a a 2001:db8:$i::2/64 dev ip6gre$i\n ip netns exec B ip link set ip6gre$i up\n done\n\nSplat looks like:\nkernel BUG at net/core/skbuff.c:110!\ninvalid opcode: 0000 [#1] SMP DEBUG_PAGEALLOC KASAN PTI\nCPU: 0 PID: 7 Comm: kworker/0:1 Not tainted 5.12.0+ #891\nWorkqueue: ipv6_addrconf addrconf_dad_work\nRIP: 0010:skb_panic+0x15d/0x15f\nCode: 92 fe 4c 8b 4c 24 10 53 8b 4d 70 45 89 e0 48 c7 c7 00 ae 79 83\n41 57 41 56 41 55 48 8b 54 24 a6 26 f9 ff <0f> 0b 48 8b 6c 24 20 89\n34 24 e8 4a 4e 92 fe 8b 34 24 48 c7 c1 20\nRSP: 0018:ffff88810091f820 EFLAGS: 00010282\nRAX: 0000000000000089 RBX: ffff8881086e9000 RCX: 0000000000000000\nRDX: 0000000000000089 RSI: 0000000000000008 RDI: ffffed1020123efb\nRBP: ffff888005f6eac0 R08: ffffed1022fc0031 R09: ffffed1022fc0031\nR10: ffff888117e00187 R11: ffffed1022fc0030 R12: 0000000000000028\nR13: ffff888008284eb0 R14: 0000000000000ed8 R15: 0000000000000ec0\nFS: 0000000000000000(0000) GS:ffff888117c00000(0000)\nknlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007f8b801c5640 CR3: 0000000033c2c006 CR4: 00000000003706f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n ? ip6_mc_hdr.isra.26.constprop.46+0x12a/0x600\n ? ip6_mc_hdr.isra.26.constprop.46+0x12a/0x600\n skb_put.cold.104+0x22/0x22\n ip6_mc_hdr.isra.26.constprop.46+0x12a/0x600\n ? rcu_read_lock_sched_held+0x91/0xc0\n mld_newpack+0x398/0x8f0\n ? ip6_mc_hdr.isra.26.constprop.46+0x600/0x600\n ? lock_contended+0xc40/0xc40\n add_grhead.isra.33+0x280/0x380\n add_grec+0x5ca/0xff0\n ? mld_sendpack+0xf40/0xf40\n ? lock_downgrade+0x690/0x690\n mld_send_initial_cr.part.34+0xb9/0x180\n ipv6_mc_dad_complete+0x15d/0x1b0\n addrconf_dad_completed+0x8d2/0xbb0\n ? lock_downgrade+0x690/0x690\n ? addrconf_rs_timer+0x660/0x660\n ? addrconf_dad_work+0x73c/0x10e0\n addrconf_dad_work+0x73c/0x10e0\n\nAllowing high order page allocation could fix this problem." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/ipv6/mcast.c" ], "versions": [ { "version": "72e09ad107e78d69ff4d3b97a69f0aad2b77280f", "lessThan": "0e35b7457b7b6e73ffeaaca1a577fdf1af0feca1", "status": "affected", "versionType": "git" }, { "version": "72e09ad107e78d69ff4d3b97a69f0aad2b77280f", "lessThan": "17728616a4c85baf0edc975c60ba4e4157684d9a", "status": "affected", "versionType": "git" }, { "version": "72e09ad107e78d69ff4d3b97a69f0aad2b77280f", "lessThan": "221142038f36d9f28b64e83e954774da4d4ccd17", "status": "affected", "versionType": "git" }, { "version": "72e09ad107e78d69ff4d3b97a69f0aad2b77280f", "lessThan": "4b77ad9097067b31237eeeee0bf70f80849680a0", "status": "affected", "versionType": "git" }, { "version": "72e09ad107e78d69ff4d3b97a69f0aad2b77280f", "lessThan": "37d697759958d111439080bab7e14d2b0e7b39f5", "status": "affected", "versionType": "git" }, { "version": "72e09ad107e78d69ff4d3b97a69f0aad2b77280f", "lessThan": "beb39adb150f8f3b516ddf7c39835a9788704d23", "status": "affected", "versionType": "git" }, { "version": "72e09ad107e78d69ff4d3b97a69f0aad2b77280f", "lessThan": "a76fb9ba545289379acf409653ad5f74417be59c", "status": "affected", "versionType": "git" }, { "version": "72e09ad107e78d69ff4d3b97a69f0aad2b77280f", "lessThan": "020ef930b826d21c5446fdc9db80fd72a791bc21", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/ipv6/mcast.c" ], "versions": [ { "version": "2.6.35", "status": "affected" }, { "version": "0", "lessThan": "2.6.35", "status": "unaffected", "versionType": "semver" }, { "version": "4.4.271", "lessThanOrEqual": "4.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.9.271", "lessThanOrEqual": "4.9.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.14.235", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.193", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.124", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.42", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.12.9", "lessThanOrEqual": "5.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.13", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.35", "versionEndExcluding": "4.4.271" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.35", "versionEndExcluding": "4.9.271" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.35", "versionEndExcluding": "4.14.235" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.35", "versionEndExcluding": "4.19.193" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.35", "versionEndExcluding": "5.4.124" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.35", "versionEndExcluding": "5.10.42" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.35", "versionEndExcluding": "5.12.9" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.35", "versionEndExcluding": "5.13" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/0e35b7457b7b6e73ffeaaca1a577fdf1af0feca1" }, { "url": "https://git.kernel.org/stable/c/17728616a4c85baf0edc975c60ba4e4157684d9a" }, { "url": "https://git.kernel.org/stable/c/221142038f36d9f28b64e83e954774da4d4ccd17" }, { "url": "https://git.kernel.org/stable/c/4b77ad9097067b31237eeeee0bf70f80849680a0" }, { "url": "https://git.kernel.org/stable/c/37d697759958d111439080bab7e14d2b0e7b39f5" }, { "url": "https://git.kernel.org/stable/c/beb39adb150f8f3b516ddf7c39835a9788704d23" }, { "url": "https://git.kernel.org/stable/c/a76fb9ba545289379acf409653ad5f74417be59c" }, { "url": "https://git.kernel.org/stable/c/020ef930b826d21c5446fdc9db80fd72a791bc21" } ], "title": "mld: fix panic in mld_newpack()", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:24:39.987Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/0e35b7457b7b6e73ffeaaca1a577fdf1af0feca1", "tags": [ "x_transferred" ] }, { "url": 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Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-09-10T15:54:54.361995Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:33:13.921Z" } } ] } }