cbcvebase.
CVE-2024-38538
published 2024-06-19

CVE-2024-38538: In the Linux kernel, the following vulnerability has been resolved: net: bridge: xmit: make sure we have at least eth header len bytes syzbot triggered an…

PriorityP429high7.1CVSS 3.1
AVLACLPRLUINSUCHINAH
EPSS
0.28%
20.7th percentile
In the Linux kernel, the following vulnerability has been resolved: net: bridge: xmit: make sure we have at least eth header len bytes syzbot triggered an uninit value[1] error in bridge device's xmit path by sending a short (less than ETH_HLEN bytes) skb. To fix it check if we can actually pull that amount instead of assuming. Tested with dropwatch: drop at: br_dev_xmit+0xb93/0x12d0 [bridge] (0xffffffffc06739b3) origin: software timestamp: Mon May 13 11:31:53 2024 778214037 nsec protocol: 0x88a8 length: 2 original length: 2 drop reason: PKT_TOO_SMALL [1] BUG: KMSAN: uninit-value in br_dev_xmit+0x61d/0x1cb0 net/bridge/br_device.c:65 br_dev_xmit+0x61d/0x1cb0 net/bridge/br_device.c:65 __netdev_start_xmit include/linux/netdevice.h:4903 [inline] netdev_start_xmit include/linux/netdevice.h:4917 [inline] xmit_one net/core/dev.c:3531 [inline] dev_hard_start_xmit+0x247/0xa20 net/core/dev.c:3547 __dev_queue_xmit+0x34db/0x5350 net/core/dev.c:4341 dev_queue_xmit include/linux/netdevice.h:3091 [inline] __bpf_tx_skb net/core/filter.c:2136 [inline] __bpf_redirect_common net/core/filter.c:2180 [inline] __bpf_redirect+0x14a6/0x1620 net/core/filter.c:2187 ____bpf_clone_redirect net/core/filter.c:2460 [inline] bpf_clone_redirect+0x328/0x470 net/core/filter.c:2432 ___bpf_prog_run+0x13fe/0xe0f0 kernel/bpf/core.c:1997 __bpf_prog_run512+0xb5/0xe0 kernel/bpf/core.c:2238 bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline] __bpf_prog_run include/linux/filter.h:657 [inline] bpf_prog_run include/linux/filter.h:664 [inline] bpf_test_run+0x499/0xc30 net/bpf/test_run.c:425 bpf_prog_test_run_skb+0x14ea/0x1f20 net/bpf/test_run.c:1058 bpf_prog_test_run+0x6b7/0xad0 kernel/bpf/syscall.c:4269 __sys_bpf+0x6aa/0xd90 kernel/bpf/syscall.c:5678 __do_sys_bpf kernel/bpf/syscall.c:5767 [inline] __se_sys_bpf kernel/bpf/syscall.c:5765 [inline] __x64_sys_bpf+0xa0/0xe0 kernel/bpf/syscall.c:5765 x64_sys_call+0x96b/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:322 do_syscall_x64 arch/x86/entry/commo

Affected

26 ranges· showing 25
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.94-1 (bookworm)linux 6.1.94-1 (bookworm)
linuxlinux
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 3e01fc3c66e65d9afe98f1489047a1b2dd8741ca3e01fc3c66e65d9afe98f1489047a1b2dd8741ca
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < b2b7c43cd32080221bb233741bd6011983fe7c11b2b7c43cd32080221bb233741bd6011983fe7c11
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 82090f94c723dab724b1c32db406091d40448a1782090f94c723dab724b1c32db406091d40448a17
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < c964429ef53f42098a6545a5dabeb1441c1e821dc964429ef53f42098a6545a5dabeb1441c1e821d
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 28126b83f86ab9cc7936029c2dff845d3dcedba228126b83f86ab9cc7936029c2dff845d3dcedba2
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 1abb371147905ba250b4cc0230c4be7e90bea4d51abb371147905ba250b4cc0230c4be7e90bea4d5
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < f482fd4ce919836a49012b2d31b00fc36e2488f2f482fd4ce919836a49012b2d31b00fc36e2488f2
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 5b5d669f569807c7ab07546e73c0741845a2547a5b5d669f569807c7ab07546e73c0741845a2547a
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 8bd67ebb50c0145fd2ca8681ab65eb7e8cde1afc8bd67ebb50c0145fd2ca8681ab65eb7e8cde1afc
linuxlinux_kernel>= 0 < 5.10.234-15.10.234-1
linuxlinux_kernel>= 0 < 6.1.94-16.1.94-1
linuxlinux_kernel>= 0 < 6.8.12-16.8.12-1
linuxlinux_kernel>= 0 < 6.8.12-16.8.12-1
linuxlinux_kernel>= 0 < 5.4.0-202.2225.4.0-202.222
linuxlinux_kernel>= 0 < 5.15.0-127.1375.15.0-127.137
linuxlinux_kernel>= 0 < 6.8.0-40.406.8.0-40.40
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 < 6.1.936.1.93
linuxlinux_kernel>= 6.2 < 6.6.336.6.33
linuxlinux_kernel>= 6.7 < 6.8.126.8.12
linuxlinux_kernel>= 6.9 < 6.9.36.9.3
msrccbl2_kernel_5.15.176.3-1_on_cbl_mariner_2.0

CVSS provenance

nvdv3.17.1HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
osv8.8HIGH
vendor_ubuntu8.8HIGH
vendor_debian7.1HIGH
vendor_msrc7.1HIGH
vendor_redhat7.1HIGH
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