CVE-2021-46992 (GCVE-0-2021-46992)

Vulnerability from cvelistv5 – Published: 2024-02-28 08:13 – Updated: 2025-05-04 07:01
VLAI?
Title
netfilter: nftables: avoid overflows in nft_hash_buckets()
Summary
In the Linux kernel, the following vulnerability has been resolved: netfilter: nftables: avoid overflows in nft_hash_buckets() Number of buckets being stored in 32bit variables, we have to ensure that no overflows occur in nft_hash_buckets() syzbot injected a size == 0x40000000 and reported: UBSAN: shift-out-of-bounds in ./include/linux/log2.h:57:13 shift exponent 64 is too large for 64-bit type 'long unsigned int' CPU: 1 PID: 29539 Comm: syz-executor.4 Not tainted 5.12.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x141/0x1d7 lib/dump_stack.c:120 ubsan_epilogue+0xb/0x5a lib/ubsan.c:148 __ubsan_handle_shift_out_of_bounds.cold+0xb1/0x181 lib/ubsan.c:327 __roundup_pow_of_two include/linux/log2.h:57 [inline] nft_hash_buckets net/netfilter/nft_set_hash.c:411 [inline] nft_hash_estimate.cold+0x19/0x1e net/netfilter/nft_set_hash.c:652 nft_select_set_ops net/netfilter/nf_tables_api.c:3586 [inline] nf_tables_newset+0xe62/0x3110 net/netfilter/nf_tables_api.c:4322 nfnetlink_rcv_batch+0xa09/0x24b0 net/netfilter/nfnetlink.c:488 nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:612 [inline] nfnetlink_rcv+0x3af/0x420 net/netfilter/nfnetlink.c:630 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1338 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927 sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:674 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2350 ___sys_sendmsg+0xf3/0x170 net/socket.c:2404 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2433 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 0ed6389c483dc77cdbdd48de0ca7ce41723dd667 , < 2824cafc6a93792d9ad85939c499161214d84c4b (git)
Affected: 0ed6389c483dc77cdbdd48de0ca7ce41723dd667 , < efcd730ddd6f25578bd31bfe703e593e2421d708 (git)
Affected: 0ed6389c483dc77cdbdd48de0ca7ce41723dd667 , < c77e2ef18167ad334e27610ced9a7f6af5ec1787 (git)
Affected: 0ed6389c483dc77cdbdd48de0ca7ce41723dd667 , < 72b49dd116ca00a46a11d5a4d8d7987f05ed9cd7 (git)
Affected: 0ed6389c483dc77cdbdd48de0ca7ce41723dd667 , < 1e8ab479cfbe5751efccedb95afb9b112a5ba475 (git)
Affected: 0ed6389c483dc77cdbdd48de0ca7ce41723dd667 , < a388d10961ff8578b1a6691945d406c0f33aa71b (git)
Affected: 0ed6389c483dc77cdbdd48de0ca7ce41723dd667 , < a54754ec9891830ba548e2010c889e3c8146e449 (git)
Create a notification for this product.
    Linux Linux Affected: 4.9
Unaffected: 0 , < 4.9 (semver)
Unaffected: 4.14.233 , ≤ 4.14.* (semver)
Unaffected: 4.19.191 , ≤ 4.19.* (semver)
Unaffected: 5.4.120 , ≤ 5.4.* (semver)
Unaffected: 5.10.38 , ≤ 5.10.* (semver)
Unaffected: 5.11.22 , ≤ 5.11.* (semver)
Unaffected: 5.12.5 , ≤ 5.12.* (semver)
Unaffected: 5.13 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
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\"https://git.kernel.org/stable/c/a388d10961ff8578b1a6691945d406c0f33aa71b\"}, {\"url\": \"https://git.kernel.org/stable/c/a54754ec9891830ba548e2010c889e3c8146e449\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnetfilter: nftables: avoid overflows in nft_hash_buckets()\\n\\nNumber of buckets being stored in 32bit variables, we have to\\nensure that no overflows occur in nft_hash_buckets()\\n\\nsyzbot injected a size == 0x40000000 and reported:\\n\\nUBSAN: shift-out-of-bounds in ./include/linux/log2.h:57:13\\nshift exponent 64 is too large for 64-bit type \u0027long unsigned int\u0027\\nCPU: 1 PID: 29539 Comm: syz-executor.4 Not tainted 5.12.0-rc7-syzkaller #0\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\\nCall Trace:\\n __dump_stack lib/dump_stack.c:79 [inline]\\n dump_stack+0x141/0x1d7 lib/dump_stack.c:120\\n ubsan_epilogue+0xb/0x5a lib/ubsan.c:148\\n __ubsan_handle_shift_out_of_bounds.cold+0xb1/0x181 lib/ubsan.c:327\\n __roundup_pow_of_two include/linux/log2.h:57 [inline]\\n nft_hash_buckets net/netfilter/nft_set_hash.c:411 [inline]\\n nft_hash_estimate.cold+0x19/0x1e net/netfilter/nft_set_hash.c:652\\n nft_select_set_ops net/netfilter/nf_tables_api.c:3586 [inline]\\n nf_tables_newset+0xe62/0x3110 net/netfilter/nf_tables_api.c:4322\\n nfnetlink_rcv_batch+0xa09/0x24b0 net/netfilter/nfnetlink.c:488\\n nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:612 [inline]\\n nfnetlink_rcv+0x3af/0x420 net/netfilter/nfnetlink.c:630\\n netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline]\\n netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1338\\n netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927\\n sock_sendmsg_nosec net/socket.c:654 [inline]\\n sock_sendmsg+0xcf/0x120 net/socket.c:674\\n ____sys_sendmsg+0x6e8/0x810 net/socket.c:2350\\n ___sys_sendmsg+0xf3/0x170 net/socket.c:2404\\n __sys_sendmsg+0xe5/0x1b0 net/socket.c:2433\\n do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.14.233\", \"versionStartIncluding\": \"4.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.191\", \"versionStartIncluding\": \"4.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.120\", \"versionStartIncluding\": \"4.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.38\", \"versionStartIncluding\": \"4.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.11.22\", \"versionStartIncluding\": \"4.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.12.5\", \"versionStartIncluding\": \"4.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.13\", \"versionStartIncluding\": \"4.9\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T07:01:53.656Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-46992\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T07:01:53.656Z\", \"dateReserved\": \"2024-02-27T18:42:55.949Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-02-28T08:13:17.814Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.