CVE - CVE-2024-41042

CVE-ID
CVE-2024-41042	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: prefer nft_chain_validate nft_chain_validate already performs loop detection because a cycle will result in a call stack overflow (ctx->level >= NFT_JUMP_STACK_SIZE). It also follows maps via ->validate callback in nft_lookup, so there appears no reason to iterate the maps again. nf_tables_check_loops() and all its helper functions can be removed. This improves ruleset load time significantly, from 23s down to 12s. This also fixes a crash bug. Old loop detection code can result in unbounded recursion: BUG: TASK stack guard page was hit at .... Oops: stack guard page: 0000 [#1] PREEMPT SMP KASAN CPU: 4 PID: 1539 Comm: nft Not tainted 6.10.0-rc5+ #1 [..] with a suitable ruleset during validation of register stores. I can't see any actual reason to attempt to check for this from nft_validate_register_store(), at this point the transaction is still in progress, so we don't have a full picture of the rule graph. For nf-next it might make sense to either remove it or make this depend on table->validate_state in case we could catch an error earlier (for improved error reporting to userspace).
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/1947e4c3346faa8ac7e343652c0fd3b3e394202f URL:https://git.kernel.org/stable/c/1947e4c3346faa8ac7e343652c0fd3b3e394202f MISC:https://git.kernel.org/stable/c/31c35f9f89ef585f1edb53e17ac73a0ca4a9712b URL:https://git.kernel.org/stable/c/31c35f9f89ef585f1edb53e17ac73a0ca4a9712b MISC:https://git.kernel.org/stable/c/717c91c6ed73e248de6a15bc53adefb81446c9d0 URL:https://git.kernel.org/stable/c/717c91c6ed73e248de6a15bc53adefb81446c9d0 MISC:https://git.kernel.org/stable/c/8246b7466c8da49d0d9e85e26cbd69dd6d3e3d1e URL:https://git.kernel.org/stable/c/8246b7466c8da49d0d9e85e26cbd69dd6d3e3d1e MISC:https://git.kernel.org/stable/c/9df785aeb7dcc8efd1d4110bb27d26005298ebae URL:https://git.kernel.org/stable/c/9df785aeb7dcc8efd1d4110bb27d26005298ebae MISC:https://git.kernel.org/stable/c/b6b6e430470e1c3c5513311cb35a15a205595abe URL:https://git.kernel.org/stable/c/b6b6e430470e1c3c5513311cb35a15a205595abe MISC:https://git.kernel.org/stable/c/cd4348e0a50286282c314ad6d2b0740e7c812c24 URL:https://git.kernel.org/stable/c/cd4348e0a50286282c314ad6d2b0740e7c812c24 MISC:https://git.kernel.org/stable/c/cff3bd012a9512ac5ed858d38e6ed65f6391008c URL:https://git.kernel.org/stable/c/cff3bd012a9512ac5ed858d38e6ed65f6391008c
Assigning CNA
kernel.org
Date Record Created
20240712	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240712)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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