CVE - CVE-2024-26640

CVE-ID
CVE-2024-26640	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: tcp: add sanity checks to rx zerocopy TCP rx zerocopy intent is to map pages initially allocated from NIC drivers, not pages owned by a fs. This patch adds to can_map_frag() these additional checks: - Page must not be a compound one. - page->mapping must be NULL. This fixes the panic reported by ZhangPeng. syzbot was able to loopback packets built with sendfile(), mapping pages owned by an ext4 file to TCP rx zerocopy. r3 = socket$inet_tcp(0x2, 0x1, 0x0) mmap(&(0x7f0000ff9000/0x4000)=nil, 0x4000, 0x0, 0x12, r3, 0x0) r4 = socket$inet_tcp(0x2, 0x1, 0x0) bind$inet(r4, &(0x7f0000000000)={0x2, 0x4e24, @multicast1}, 0x10) connect$inet(r4, &(0x7f00000006c0)={0x2, 0x4e24, @empty}, 0x10) r5 = openat$dir(0xffffffffffffff9c, &(0x7f00000000c0)='./file0\x00', 0x181e42, 0x0) fallocate(r5, 0x0, 0x0, 0x85b8) sendfile(r4, r5, 0x0, 0x8ba0) getsockopt$inet_tcp_TCP_ZEROCOPY_RECEIVE(r4, 0x6, 0x23, &(0x7f00000001c0)={&(0x7f0000ffb000/0x3000)=nil, 0x3000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, &(0x7f0000000440)=0x40) r6 = openat$dir(0xffffffffffffff9c, &(0x7f00000000c0)='./file0\x00', 0x181e42, 0x0)
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/1b8adcc0e2c584fec778add7777fe28e20781e60 URL:https://git.kernel.org/stable/c/1b8adcc0e2c584fec778add7777fe28e20781e60 MISC:https://git.kernel.org/stable/c/577e4432f3ac810049cb7e6b71f4d96ec7c6e894 URL:https://git.kernel.org/stable/c/577e4432f3ac810049cb7e6b71f4d96ec7c6e894 MISC:https://git.kernel.org/stable/c/718f446e60316bf606946f7f42367d691d21541e URL:https://git.kernel.org/stable/c/718f446e60316bf606946f7f42367d691d21541e MISC:https://git.kernel.org/stable/c/b383d4ea272fe5795877506dcce5aad1f6330e5e URL:https://git.kernel.org/stable/c/b383d4ea272fe5795877506dcce5aad1f6330e5e MISC:https://git.kernel.org/stable/c/d15cc0f66884ef2bed28c7ccbb11c102aa3a0760 URL:https://git.kernel.org/stable/c/d15cc0f66884ef2bed28c7ccbb11c102aa3a0760 MISC:https://git.kernel.org/stable/c/f48bf9a83b1666d934247cb58a9887d7b3127b6f URL:https://git.kernel.org/stable/c/f48bf9a83b1666d934247cb58a9887d7b3127b6f
Assigning CNA
kernel.org
Date Record Created
20240219	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 (20240219)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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