CVE-2024-42076 (GCVE-0-2024-42076)

Vulnerability from cvelistv5 – Published: 2024-07-29 15:52 – Updated: 2025-11-03 22:01
VLAI?
Title
net: can: j1939: Initialize unused data in j1939_send_one()
Summary
In the Linux kernel, the following vulnerability has been resolved: net: can: j1939: Initialize unused data in j1939_send_one() syzbot reported kernel-infoleak in raw_recvmsg() [1]. j1939_send_one() creates full frame including unused data, but it doesn't initialize it. This causes the kernel-infoleak issue. Fix this by initializing unused data. [1] BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline] BUG: KMSAN: kernel-infoleak in copy_to_user_iter lib/iov_iter.c:24 [inline] BUG: KMSAN: kernel-infoleak in iterate_ubuf include/linux/iov_iter.h:29 [inline] BUG: KMSAN: kernel-infoleak in iterate_and_advance2 include/linux/iov_iter.h:245 [inline] BUG: KMSAN: kernel-infoleak in iterate_and_advance include/linux/iov_iter.h:271 [inline] BUG: KMSAN: kernel-infoleak in _copy_to_iter+0x366/0x2520 lib/iov_iter.c:185 instrument_copy_to_user include/linux/instrumented.h:114 [inline] copy_to_user_iter lib/iov_iter.c:24 [inline] iterate_ubuf include/linux/iov_iter.h:29 [inline] iterate_and_advance2 include/linux/iov_iter.h:245 [inline] iterate_and_advance include/linux/iov_iter.h:271 [inline] _copy_to_iter+0x366/0x2520 lib/iov_iter.c:185 copy_to_iter include/linux/uio.h:196 [inline] memcpy_to_msg include/linux/skbuff.h:4113 [inline] raw_recvmsg+0x2b8/0x9e0 net/can/raw.c:1008 sock_recvmsg_nosec net/socket.c:1046 [inline] sock_recvmsg+0x2c4/0x340 net/socket.c:1068 ____sys_recvmsg+0x18a/0x620 net/socket.c:2803 ___sys_recvmsg+0x223/0x840 net/socket.c:2845 do_recvmmsg+0x4fc/0xfd0 net/socket.c:2939 __sys_recvmmsg net/socket.c:3018 [inline] __do_sys_recvmmsg net/socket.c:3041 [inline] __se_sys_recvmmsg net/socket.c:3034 [inline] __x64_sys_recvmmsg+0x397/0x490 net/socket.c:3034 x64_sys_call+0xf6c/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:300 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was created at: slab_post_alloc_hook mm/slub.c:3804 [inline] slab_alloc_node mm/slub.c:3845 [inline] kmem_cache_alloc_node+0x613/0xc50 mm/slub.c:3888 kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:577 __alloc_skb+0x35b/0x7a0 net/core/skbuff.c:668 alloc_skb include/linux/skbuff.h:1313 [inline] alloc_skb_with_frags+0xc8/0xbf0 net/core/skbuff.c:6504 sock_alloc_send_pskb+0xa81/0xbf0 net/core/sock.c:2795 sock_alloc_send_skb include/net/sock.h:1842 [inline] j1939_sk_alloc_skb net/can/j1939/socket.c:878 [inline] j1939_sk_send_loop net/can/j1939/socket.c:1142 [inline] j1939_sk_sendmsg+0xc0a/0x2730 net/can/j1939/socket.c:1277 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x30f/0x380 net/socket.c:745 ____sys_sendmsg+0x877/0xb60 net/socket.c:2584 ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2638 __sys_sendmsg net/socket.c:2667 [inline] __do_sys_sendmsg net/socket.c:2676 [inline] __se_sys_sendmsg net/socket.c:2674 [inline] __x64_sys_sendmsg+0x307/0x4a0 net/socket.c:2674 x64_sys_call+0xc4b/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:47 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Bytes 12-15 of 16 are uninitialized Memory access of size 16 starts at ffff888120969690 Data copied to user address 00000000200017c0 CPU: 1 PID: 5050 Comm: syz-executor198 Not tainted 6.9.0-rc5-syzkaller-00031-g71b1543c83d6 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 9d71dd0c70099914fcd063135da3c580865e924c , < 5e4ed38eb17eaca42de57d500cc0f9668d2b6abf (git)
Affected: 9d71dd0c70099914fcd063135da3c580865e924c , < a2a0ebff7fdeb2f66e29335adf64b9e457300dd4 (git)
Affected: 9d71dd0c70099914fcd063135da3c580865e924c , < 4c5dc3927e17489c1cae6f48c0d5e4acb4cae01f (git)
Affected: 9d71dd0c70099914fcd063135da3c580865e924c , < f97cbce633923588307049c4aef9feb2987e371b (git)
Affected: 9d71dd0c70099914fcd063135da3c580865e924c , < ab2a683938ba4416d389c2f5651cbbb2c41b779f (git)
Affected: 9d71dd0c70099914fcd063135da3c580865e924c , < ba7e5ae8208ac07d8e1eace0951a34c169a2d298 (git)
Affected: 9d71dd0c70099914fcd063135da3c580865e924c , < b7cdf1dd5d2a2d8200efd98d1893684db48fe134 (git)
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    Linux Linux Affected: 5.4
Unaffected: 0 , < 5.4 (semver)
Unaffected: 5.4.279 , ≤ 5.4.* (semver)
Unaffected: 5.10.221 , ≤ 5.10.* (semver)
Unaffected: 5.15.162 , ≤ 5.15.* (semver)
Unaffected: 6.1.97 , ≤ 6.1.* (semver)
Unaffected: 6.6.37 , ≤ 6.6.* (semver)
Unaffected: 6.9.8 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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\"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T04:54:31.919Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-42076\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T16:19:26.772684Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:19.843Z\"}}], \"cna\": {\"title\": \"net: can: j1939: Initialize unused data in j1939_send_one()\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"9d71dd0c70099914fcd063135da3c580865e924c\", \"lessThan\": \"5e4ed38eb17eaca42de57d500cc0f9668d2b6abf\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"9d71dd0c70099914fcd063135da3c580865e924c\", \"lessThan\": \"a2a0ebff7fdeb2f66e29335adf64b9e457300dd4\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"9d71dd0c70099914fcd063135da3c580865e924c\", \"lessThan\": \"4c5dc3927e17489c1cae6f48c0d5e4acb4cae01f\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"9d71dd0c70099914fcd063135da3c580865e924c\", \"lessThan\": \"f97cbce633923588307049c4aef9feb2987e371b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"9d71dd0c70099914fcd063135da3c580865e924c\", \"lessThan\": \"ab2a683938ba4416d389c2f5651cbbb2c41b779f\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"9d71dd0c70099914fcd063135da3c580865e924c\", \"lessThan\": \"ba7e5ae8208ac07d8e1eace0951a34c169a2d298\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"9d71dd0c70099914fcd063135da3c580865e924c\", \"lessThan\": \"b7cdf1dd5d2a2d8200efd98d1893684db48fe134\", \"versionType\": \"git\"}], \"programFiles\": [\"net/can/j1939/main.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.4\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.4\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.4.279\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.221\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.162\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.97\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.37\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.9.8\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.9.*\"}, {\"status\": \"unaffected\", \"version\": \"6.10\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/can/j1939/main.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/5e4ed38eb17eaca42de57d500cc0f9668d2b6abf\"}, {\"url\": \"https://git.kernel.org/stable/c/a2a0ebff7fdeb2f66e29335adf64b9e457300dd4\"}, {\"url\": \"https://git.kernel.org/stable/c/4c5dc3927e17489c1cae6f48c0d5e4acb4cae01f\"}, {\"url\": \"https://git.kernel.org/stable/c/f97cbce633923588307049c4aef9feb2987e371b\"}, {\"url\": \"https://git.kernel.org/stable/c/ab2a683938ba4416d389c2f5651cbbb2c41b779f\"}, {\"url\": \"https://git.kernel.org/stable/c/ba7e5ae8208ac07d8e1eace0951a34c169a2d298\"}, {\"url\": \"https://git.kernel.org/stable/c/b7cdf1dd5d2a2d8200efd98d1893684db48fe134\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: can: j1939: Initialize unused data in j1939_send_one()\\n\\nsyzbot reported kernel-infoleak in raw_recvmsg() [1]. j1939_send_one()\\ncreates full frame including unused data, but it doesn\u0027t initialize\\nit. This causes the kernel-infoleak issue. Fix this by initializing\\nunused data.\\n\\n[1]\\nBUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline]\\nBUG: KMSAN: kernel-infoleak in copy_to_user_iter lib/iov_iter.c:24 [inline]\\nBUG: KMSAN: kernel-infoleak in iterate_ubuf include/linux/iov_iter.h:29 [inline]\\nBUG: KMSAN: kernel-infoleak in iterate_and_advance2 include/linux/iov_iter.h:245 [inline]\\nBUG: KMSAN: kernel-infoleak in iterate_and_advance include/linux/iov_iter.h:271 [inline]\\nBUG: KMSAN: kernel-infoleak in _copy_to_iter+0x366/0x2520 lib/iov_iter.c:185\\n instrument_copy_to_user include/linux/instrumented.h:114 [inline]\\n copy_to_user_iter lib/iov_iter.c:24 [inline]\\n iterate_ubuf include/linux/iov_iter.h:29 [inline]\\n iterate_and_advance2 include/linux/iov_iter.h:245 [inline]\\n iterate_and_advance include/linux/iov_iter.h:271 [inline]\\n _copy_to_iter+0x366/0x2520 lib/iov_iter.c:185\\n copy_to_iter include/linux/uio.h:196 [inline]\\n memcpy_to_msg include/linux/skbuff.h:4113 [inline]\\n raw_recvmsg+0x2b8/0x9e0 net/can/raw.c:1008\\n sock_recvmsg_nosec net/socket.c:1046 [inline]\\n sock_recvmsg+0x2c4/0x340 net/socket.c:1068\\n ____sys_recvmsg+0x18a/0x620 net/socket.c:2803\\n ___sys_recvmsg+0x223/0x840 net/socket.c:2845\\n do_recvmmsg+0x4fc/0xfd0 net/socket.c:2939\\n __sys_recvmmsg net/socket.c:3018 [inline]\\n __do_sys_recvmmsg net/socket.c:3041 [inline]\\n __se_sys_recvmmsg net/socket.c:3034 [inline]\\n __x64_sys_recvmmsg+0x397/0x490 net/socket.c:3034\\n x64_sys_call+0xf6c/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:300\\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\\n do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83\\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\\n\\nUninit was created at:\\n slab_post_alloc_hook mm/slub.c:3804 [inline]\\n slab_alloc_node mm/slub.c:3845 [inline]\\n kmem_cache_alloc_node+0x613/0xc50 mm/slub.c:3888\\n kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:577\\n __alloc_skb+0x35b/0x7a0 net/core/skbuff.c:668\\n alloc_skb include/linux/skbuff.h:1313 [inline]\\n alloc_skb_with_frags+0xc8/0xbf0 net/core/skbuff.c:6504\\n sock_alloc_send_pskb+0xa81/0xbf0 net/core/sock.c:2795\\n sock_alloc_send_skb include/net/sock.h:1842 [inline]\\n j1939_sk_alloc_skb net/can/j1939/socket.c:878 [inline]\\n j1939_sk_send_loop net/can/j1939/socket.c:1142 [inline]\\n j1939_sk_sendmsg+0xc0a/0x2730 net/can/j1939/socket.c:1277\\n sock_sendmsg_nosec net/socket.c:730 [inline]\\n __sock_sendmsg+0x30f/0x380 net/socket.c:745\\n ____sys_sendmsg+0x877/0xb60 net/socket.c:2584\\n ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2638\\n __sys_sendmsg net/socket.c:2667 [inline]\\n __do_sys_sendmsg net/socket.c:2676 [inline]\\n __se_sys_sendmsg net/socket.c:2674 [inline]\\n __x64_sys_sendmsg+0x307/0x4a0 net/socket.c:2674\\n x64_sys_call+0xc4b/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:47\\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\\n do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83\\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\\n\\nBytes 12-15 of 16 are uninitialized\\nMemory access of size 16 starts at ffff888120969690\\nData copied to user address 00000000200017c0\\n\\nCPU: 1 PID: 5050 Comm: syz-executor198 Not tainted 6.9.0-rc5-syzkaller-00031-g71b1543c83d6 #0\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.279\", \"versionStartIncluding\": \"5.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.221\", \"versionStartIncluding\": \"5.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.162\", \"versionStartIncluding\": \"5.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.97\", \"versionStartIncluding\": \"5.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.37\", \"versionStartIncluding\": \"5.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.9.8\", \"versionStartIncluding\": \"5.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.10\", \"versionStartIncluding\": \"5.4\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T09:22:27.050Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-42076\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T09:22:27.050Z\", \"dateReserved\": \"2024-07-29T15:50:41.169Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-07-29T15:52:38.981Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Sightings

Author Source Type Date

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.