{"dataType":"CVE_RECORD","cveMetadata":{"cveId":"CVE-2024-26805","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-02-19T14:20:24.179Z","datePublished":"2024-04-04T08:20:32.250Z","dateUpdated":"2026-05-11T20:04:30.779Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T20:04:30.779Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetlink: Fix kernel-infoleak-after-free in __skb_datagram_iter\n\nsyzbot reported the following uninit-value access issue [1]:\n\nnetlink_to_full_skb() creates a new `skb` and puts the `skb->data`\npassed as a 1st arg of netlink_to_full_skb() onto new `skb`. The data\nsize is specified as `len` and passed to skb_put_data(). This `len`\nis based on `skb->end` that is not data offset but buffer offset. The\n`skb->end` contains data and tailroom. Since the tailroom is not\ninitialized when the new `skb` created, KMSAN detects uninitialized\nmemory area when copying the data.\n\nThis patch resolved this issue by correct the len from `skb->end` to\n`skb->len`, which is the actual data offset.\n\nBUG: KMSAN: kernel-infoleak-after-free in instrument_copy_to_user include/linux/instrumented.h:114 [inline]\nBUG: KMSAN: kernel-infoleak-after-free in copy_to_user_iter lib/iov_iter.c:24 [inline]\nBUG: KMSAN: kernel-infoleak-after-free in iterate_ubuf include/linux/iov_iter.h:29 [inline]\nBUG: KMSAN: kernel-infoleak-after-free in iterate_and_advance2 include/linux/iov_iter.h:245 [inline]\nBUG: KMSAN: kernel-infoleak-after-free in iterate_and_advance include/linux/iov_iter.h:271 [inline]\nBUG: KMSAN: kernel-infoleak-after-free in _copy_to_iter+0x364/0x2520 lib/iov_iter.c:186\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+0x364/0x2520 lib/iov_iter.c:186\n copy_to_iter include/linux/uio.h:197 [inline]\n simple_copy_to_iter+0x68/0xa0 net/core/datagram.c:532\n __skb_datagram_iter+0x123/0xdc0 net/core/datagram.c:420\n skb_copy_datagram_iter+0x5c/0x200 net/core/datagram.c:546\n skb_copy_datagram_msg include/linux/skbuff.h:3960 [inline]\n packet_recvmsg+0xd9c/0x2000 net/packet/af_packet.c:3482\n sock_recvmsg_nosec net/socket.c:1044 [inline]\n sock_recvmsg net/socket.c:1066 [inline]\n sock_read_iter+0x467/0x580 net/socket.c:1136\n call_read_iter include/linux/fs.h:2014 [inline]\n new_sync_read fs/read_write.c:389 [inline]\n vfs_read+0x8f6/0xe00 fs/read_write.c:470\n ksys_read+0x20f/0x4c0 fs/read_write.c:613\n __do_sys_read fs/read_write.c:623 [inline]\n __se_sys_read fs/read_write.c:621 [inline]\n __x64_sys_read+0x93/0xd0 fs/read_write.c:621\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x63/0x6b\n\nUninit was stored to memory at:\n skb_put_data include/linux/skbuff.h:2622 [inline]\n netlink_to_full_skb net/netlink/af_netlink.c:181 [inline]\n __netlink_deliver_tap_skb net/netlink/af_netlink.c:298 [inline]\n __netlink_deliver_tap+0x5be/0xc90 net/netlink/af_netlink.c:325\n netlink_deliver_tap net/netlink/af_netlink.c:338 [inline]\n netlink_deliver_tap_kernel net/netlink/af_netlink.c:347 [inline]\n netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline]\n netlink_unicast+0x10f1/0x1250 net/netlink/af_netlink.c:1368\n netlink_sendmsg+0x1238/0x13d0 net/netlink/af_netlink.c:1910\n sock_sendmsg_nosec net/socket.c:730 [inline]\n __sock_sendmsg net/socket.c:745 [inline]\n ____sys_sendmsg+0x9c2/0xd60 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+0x307/0x490 net/socket.c:2674\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x63/0x6b\n\nUninit was created at:\n free_pages_prepare mm/page_alloc.c:1087 [inline]\n free_unref_page_prepare+0xb0/0xa40 mm/page_alloc.c:2347\n free_unref_page_list+0xeb/0x1100 mm/page_alloc.c:2533\n release_pages+0x23d3/0x2410 mm/swap.c:1042\n free_pages_and_swap_cache+0xd9/0xf0 mm/swap_state.c:316\n tlb_batch_pages\n---truncated---"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netlink/af_netlink.c"],"versions":[{"version":"1853c949646005b5959c483becde86608f548f24","lessThan":"ec343a55b687a452f5e87f3b52bf9f155864df65","status":"affected","versionType":"git"},{"version":"1853c949646005b5959c483becde86608f548f24","lessThan":"9ae51361da43270f4ba0eb924427a07e87e48777","status":"affected","versionType":"git"},{"version":"1853c949646005b5959c483becde86608f548f24","lessThan":"f19d1f98e60e68b11fc60839105dd02a30ec0d77","status":"affected","versionType":"git"},{"version":"1853c949646005b5959c483becde86608f548f24","lessThan":"c71ed29d15b1a1ed6c464f8c3536996963046285","status":"affected","versionType":"git"},{"version":"1853c949646005b5959c483becde86608f548f24","lessThan":"0b27bf4c494d61e5663baa34c3edd7ccebf0ea44","status":"affected","versionType":"git"},{"version":"1853c949646005b5959c483becde86608f548f24","lessThan":"d3ada42e534a83b618bbc1e490d23bf0fdae4736","status":"affected","versionType":"git"},{"version":"1853c949646005b5959c483becde86608f548f24","lessThan":"59fc3e3d049e39e7d0d271f20dd5fb47c57faf1d","status":"affected","versionType":"git"},{"version":"1853c949646005b5959c483becde86608f548f24","lessThan":"661779e1fcafe1b74b3f3fe8e980c1e207fea1fd","status":"affected","versionType":"git"},{"version":"92994a5f49d0a81c8643452d5c0a6e8b31d85a61","status":"affected","versionType":"git"},{"version":"85aec6328f3346b0718211faad564a3ffa64f60e","status":"affected","versionType":"git"},{"version":"d38200098e3203ba30ba06ed3f345ec6ca75234c","status":"affected","versionType":"git"},{"version":"65d48c630ff80a19c39751a4a6d3315f4c3c0280","status":"affected","versionType":"git"},{"version":"62f43b58d2b2c4f0200b9ca2b997f4c484f0272f","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/netlink/af_netlink.c"],"versions":[{"version":"4.3","status":"affected"},{"version":"0","lessThan":"4.3","status":"unaffected","versionType":"semver"},{"version":"4.19.309","lessThanOrEqual":"4.19.*","status":"unaffected","versionType":"semver"},{"version":"5.4.271","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.212","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.151","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.81","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.21","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.7.9","lessThanOrEqual":"6.7.*","status":"unaffected","versionType":"semver"},{"version":"6.8","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":"4.3","versionEndExcluding":"4.19.309"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.3","versionEndExcluding":"5.4.271"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.3","versionEndExcluding":"5.10.212"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.3","versionEndExcluding":"5.15.151"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.3","versionEndExcluding":"6.1.81"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.3","versionEndExcluding":"6.6.21"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.3","versionEndExcluding":"6.7.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.3","versionEndExcluding":"6.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.12.49"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.14.54"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.18.23"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.1.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2.3"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/ec343a55b687a452f5e87f3b52bf9f155864df65"},{"url":"https://git.kernel.org/stable/c/9ae51361da43270f4ba0eb924427a07e87e48777"},{"url":"https://git.kernel.org/stable/c/f19d1f98e60e68b11fc60839105dd02a30ec0d77"},{"url":"https://git.kernel.org/stable/c/c71ed29d15b1a1ed6c464f8c3536996963046285"},{"url":"https://git.kernel.org/stable/c/0b27bf4c494d61e5663baa34c3edd7ccebf0ea44"},{"url":"https://git.kernel.org/stable/c/d3ada42e534a83b618bbc1e490d23bf0fdae4736"},{"url":"https://git.kernel.org/stable/c/59fc3e3d049e39e7d0d271f20dd5fb47c57faf1d"},{"url":"https://git.kernel.org/stable/c/661779e1fcafe1b74b3f3fe8e980c1e207fea1fd"}],"title":"netlink: Fix kernel-infoleak-after-free in __skb_datagram_iter","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2024-06-21T16:06:14.957747Z","id":"CVE-2024-26805","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-06-21T16:06:26.202Z"}},{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-02T00:14:13.525Z"},"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/ec343a55b687a452f5e87f3b52bf9f155864df65","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/9ae51361da43270f4ba0eb924427a07e87e48777","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/f19d1f98e60e68b11fc60839105dd02a30ec0d77","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/c71ed29d15b1a1ed6c464f8c3536996963046285","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/0b27bf4c494d61e5663baa34c3edd7ccebf0ea44","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/d3ada42e534a83b618bbc1e490d23bf0fdae4736","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/59fc3e3d049e39e7d0d271f20dd5fb47c57faf1d","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/661779e1fcafe1b74b3f3fe8e980c1e207fea1fd","tags":["x_transferred"]},{"url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html","tags":["x_transferred"]},{"url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html","tags":["x_transferred"]}]}]},"dataVersion":"5.2"}