cbcvebase.
CVE-2024-43835
published 2024-08-17

CVE-2024-43835: In the Linux kernel, the following vulnerability has been resolved: virtio_net: Fix napi_skb_cache_put warning After the commit bdacf3e34945 ("net: Use…

PriorityP419medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.25%
16.1th percentile
In the Linux kernel, the following vulnerability has been resolved: virtio_net: Fix napi_skb_cache_put warning After the commit bdacf3e34945 ("net: Use nested-BH locking for napi_alloc_cache.") was merged, the following warning began to appear: WARNING: CPU: 5 PID: 1 at net/core/skbuff.c:1451 napi_skb_cache_put+0x82/0x4b0 __warn+0x12f/0x340 napi_skb_cache_put+0x82/0x4b0 napi_skb_cache_put+0x82/0x4b0 report_bug+0x165/0x370 handle_bug+0x3d/0x80 exc_invalid_op+0x1a/0x50 asm_exc_invalid_op+0x1a/0x20 __free_old_xmit+0x1c8/0x510 napi_skb_cache_put+0x82/0x4b0 __free_old_xmit+0x1c8/0x510 __free_old_xmit+0x1c8/0x510 __pfx___free_old_xmit+0x10/0x10 The issue arises because virtio is assuming it's running in NAPI context even when it's not, such as in the netpoll case. To resolve this, modify virtnet_poll_tx() to only set NAPI when budget is available. Same for virtnet_poll_cleantx(), which always assumed that it was in a NAPI context.

Affected

22 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.112-1 (bookworm)linux 6.1.112-1 (bookworm)
debianlinux-6.1< linux 6.1.112-1 (bookworm)linux 6.1.112-1 (bookworm)
linuxlinux
linuxlinux>= df133f3f96257ee29696c0ed8bd198ec801dc810 < d3af435e8ace119e58d8e21d3d2d6a4e7c4a4baad3af435e8ace119e58d8e21d3d2d6a4e7c4a4baa
linuxlinux>= df133f3f96257ee29696c0ed8bd198ec801dc810 < 842a97b5e44f0c8a9fc356fe976e0e13ddcf7783842a97b5e44f0c8a9fc356fe976e0e13ddcf7783
linuxlinux>= df133f3f96257ee29696c0ed8bd198ec801dc810 < cc7340f18e45886121c131227985d64ef666012fcc7340f18e45886121c131227985d64ef666012f
linuxlinux>= df133f3f96257ee29696c0ed8bd198ec801dc810 < 6b5325f2457521bbece29499970c0117a648c6206b5325f2457521bbece29499970c0117a648c620
linuxlinux>= df133f3f96257ee29696c0ed8bd198ec801dc810 < f5e9a22d19bb98a7e86034db85eb295e94187caaf5e9a22d19bb98a7e86034db85eb295e94187caa
linuxlinux>= df133f3f96257ee29696c0ed8bd198ec801dc810 < 468a729b78895893d0e580ceea49bed8ada2a2bd468a729b78895893d0e580ceea49bed8ada2a2bd
linuxlinux>= df133f3f96257ee29696c0ed8bd198ec801dc810 < f8321fa75102246d7415a6af441872f6637c93abf8321fa75102246d7415a6af441872f6637c93ab
linuxlinux_kernel>= 0 < 5.10.226-15.10.226-1
linuxlinux_kernel>= 0 < 6.1.112-16.1.112-1
linuxlinux_kernel>= 0 < 6.10.3-16.10.3-1
linuxlinux_kernel>= 0 < 6.10.3-16.10.3-1
linuxlinux_kernel>= 0 < 5.4.0-200.2205.4.0-200.220
linuxlinux_kernel>= 0 < 5.15.0-125.1355.15.0-125.135
linuxlinux_kernel>= 0 < 6.8.0-50.516.8.0-50.51
linuxlinux_kernel>= 5.0 < 6.10.36.10.3
msrcazl3_kernel_6.6.64.2-9_on_azure_linux_3.0
msrcazl3_kernel_6.6.92.2-1_on_azure_linux_3.0
msrccbl2_kernel_5.15.176.3-1_on_cbl_mariner_2.0
msrccbl2_kernel_5.15.180.1-1_on_cbl_mariner_2.0

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv8.8HIGH
vendor_ubuntu8.8HIGH
vendor_debian5.5MEDIUM
vendor_msrc5.5MEDIUM
vendor_redhat5.5MEDIUM
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