CVE-2024-43835
"Virtio Net Unauthenticated Event Processing Vulnerability"
Description
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.
INFO
Published Date :
Aug. 17, 2024, 10:15 a.m.
Last Modified :
Oct. 30, 2024, 9:45 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
1.8
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2024-43835.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2024-43835 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2024-43835 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Oct. 30, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://git.kernel.org/stable/c/19ac6f29bf64304ef04630c8ab56ecd2059d7aa1 No Types Assigned https://git.kernel.org/stable/c/19ac6f29bf64304ef04630c8ab56ecd2059d7aa1 Patch Changed Reference Type https://git.kernel.org/stable/c/468a729b78895893d0e580ceea49bed8ada2a2bd No Types Assigned https://git.kernel.org/stable/c/468a729b78895893d0e580ceea49bed8ada2a2bd Patch Changed Reference Type https://git.kernel.org/stable/c/6b5325f2457521bbece29499970c0117a648c620 No Types Assigned https://git.kernel.org/stable/c/6b5325f2457521bbece29499970c0117a648c620 Patch Changed Reference Type https://git.kernel.org/stable/c/842a97b5e44f0c8a9fc356fe976e0e13ddcf7783 No Types Assigned https://git.kernel.org/stable/c/842a97b5e44f0c8a9fc356fe976e0e13ddcf7783 Patch Changed Reference Type https://git.kernel.org/stable/c/cc7340f18e45886121c131227985d64ef666012f No Types Assigned https://git.kernel.org/stable/c/cc7340f18e45886121c131227985d64ef666012f Patch Changed Reference Type https://git.kernel.org/stable/c/d3af435e8ace119e58d8e21d3d2d6a4e7c4a4baa No Types Assigned https://git.kernel.org/stable/c/d3af435e8ace119e58d8e21d3d2d6a4e7c4a4baa Patch Changed Reference Type https://git.kernel.org/stable/c/f5e9a22d19bb98a7e86034db85eb295e94187caa No Types Assigned https://git.kernel.org/stable/c/f5e9a22d19bb98a7e86034db85eb295e94187caa Patch Changed Reference Type https://git.kernel.org/stable/c/f8321fa75102246d7415a6af441872f6637c93ab No Types Assigned https://git.kernel.org/stable/c/f8321fa75102246d7415a6af441872f6637c93ab Patch Added CWE NIST NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.0 up to (excluding) 6.10.3 -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Sep. 12, 2024
Action Type Old Value New Value Added Reference kernel.org https://git.kernel.org/stable/c/19ac6f29bf64304ef04630c8ab56ecd2059d7aa1 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/d3af435e8ace119e58d8e21d3d2d6a4e7c4a4baa [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/842a97b5e44f0c8a9fc356fe976e0e13ddcf7783 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/cc7340f18e45886121c131227985d64ef666012f [No types assigned] -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Sep. 08, 2024
Action Type Old Value New Value Added Reference kernel.org https://git.kernel.org/stable/c/6b5325f2457521bbece29499970c0117a648c620 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/f5e9a22d19bb98a7e86034db85eb295e94187caa [No types assigned] -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2024
Action Type Old Value New Value Added Description 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. Added Reference kernel.org https://git.kernel.org/stable/c/468a729b78895893d0e580ceea49bed8ada2a2bd [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/f8321fa75102246d7415a6af441872f6637c93ab [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2024-43835 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2024-43835
weaknesses.