cbcvebase.
CVE-2024-26636
published 2024-03-18

CVE-2024-26636: In the Linux kernel, the following vulnerability has been resolved: llc: make llc_ui_sendmsg() more robust against bonding changes syzbot was able to trick…

PriorityP420medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.24%
15.2th percentile
In the Linux kernel, the following vulnerability has been resolved: llc: make llc_ui_sendmsg() more robust against bonding changes syzbot was able to trick llc_ui_sendmsg(), allocating an skb with no headroom, but subsequently trying to push 14 bytes of Ethernet header [1] Like some others, llc_ui_sendmsg() releases the socket lock before calling sock_alloc_send_skb(). Then it acquires it again, but does not redo all the sanity checks that were performed. This fix: - Uses LL_RESERVED_SPACE() to reserve space. - Check all conditions again after socket lock is held again. - Do not account Ethernet header for mtu limitation. [1] skbuff: skb_under_panic: text:ffff800088baa334 len:1514 put:14 head:ffff0000c9c37000 data:ffff0000c9c36ff2 tail:0x5dc end:0x6c0 dev:bond0 kernel BUG at net/core/skbuff.c:193 ! Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 6875 Comm: syz-executor.0 Not tainted 6.7.0-rc8-syzkaller-00101-g0802e17d9aca-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : skb_panic net/core/skbuff.c:189 [inline] pc : skb_under_panic+0x13c/0x140 net/core/skbuff.c:203 lr : skb_panic net/core/skbuff.c:189 [inline] lr : skb_under_panic+0x13c/0x140 net/core/skbuff.c:203 sp : ffff800096f97000 x29: ffff800096f97010 x28: ffff80008cc8d668 x27: dfff800000000000 x26: ffff0000cb970c90 x25: 00000000000005dc x24: ffff0000c9c36ff2 x23: ffff0000c9c37000 x22: 00000000000005ea x21: 00000000000006c0 x20: 000000000000000e x19: ffff800088baa334 x18: 1fffe000368261ce x17: ffff80008e4ed000 x16: ffff80008a8310f8 x15: 0000000000000001 x14: 1ffff00012df2d58 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000000001 x10: 0000000000ff0100 x9 : e28a51f1087e8400 x8 : e28a51f1087e8400 x7 : ffff80008028f8d0 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff800082b78714 x2 : 0000000000000001 x1 : 000

Affected

27 ranges· showing 25
VendorProductVersion rangeFixed in
debiandebian_linux
debianlinux< linux 6.1.76-1 (bookworm)linux 6.1.76-1 (bookworm)
linuxlinux
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 84e9d10419f6f4f3f3cd8f9aaf44a48719aa4b1b84e9d10419f6f4f3f3cd8f9aaf44a48719aa4b1b
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < b643d0defcbacd7fe548bc65c3e4e6f17dc5eb2db643d0defcbacd7fe548bc65c3e4e6f17dc5eb2d
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 04f2a74b562f3a7498be0399309669f342793d8c04f2a74b562f3a7498be0399309669f342793d8c
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < c22044270da68881074fda81a7d34812726cb249c22044270da68881074fda81a7d34812726cb249
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 6d53b813ff8b177f86f149c2f744442681f720e46d53b813ff8b177f86f149c2f744442681f720e4
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < cafd3ad3fe03ef4d6632747be9ee15dc0029db4bcafd3ad3fe03ef4d6632747be9ee15dc0029db4b
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < c451c008f563d56d5e676c9dcafae565fcad84bbc451c008f563d56d5e676c9dcafae565fcad84bb
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < dad555c816a50c6a6a8a86be1f9177673918c647dad555c816a50c6a6a8a86be1f9177673918c647
linuxlinux_kernel
linuxlinux_kernel>= 0 < 5.10.216-15.10.216-1
linuxlinux_kernel>= 0 < 6.1.76-16.1.76-1
linuxlinux_kernel>= 0 < 6.6.15-16.6.15-1
linuxlinux_kernel>= 0 < 6.6.15-16.6.15-1
linuxlinux_kernel>= 0 < 5.4.0-181.2015.4.0-181.201
linuxlinux_kernel>= 0 < 5.15.0-106.1165.15.0-106.116
linuxlinux_kernel>= 0 < 4.4.0-261.2954.4.0-261.295
linuxlinux_kernel>= 0 < 4.15.0-231.2434.15.0-231.243
linuxlinux_kernel>= 2.6.12 < 4.19.3074.19.307
linuxlinux_kernel>= 4.20 < 5.4.2695.4.269
linuxlinux_kernel>= 5.11 < 5.15.1495.15.149
linuxlinux_kernel>= 5.16 < 6.1.766.1.76
linuxlinux_kernel>= 5.5 < 5.10.2105.10.210

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv7.8HIGH
vendor_ubuntu7.8HIGH
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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