CVE-2024-26640 Affecting kernel-debug-debuginfo package, versions <0:4.18.0-553.16.1.el8_10
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Test your applications- Snyk ID SNYK-ROCKY8-KERNELDEBUGDEBUGINFO-7783339
- published 22 Aug 2024
- disclosed 18 Mar 2024
Introduced: 18 Mar 2024
CVE-2024-26640 Open this link in a new tabHow to fix?
Upgrade Rocky-Linux:8 kernel-debug-debuginfo to version 0:4.18.0-553.16.1.el8_10 or higher.
This issue was patched in RLSA-2024:5101.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-debug-debuginfo package and not the kernel-debug-debuginfo package as distributed by Rocky-Linux.
See How to fix? for Rocky-Linux:8 relevant fixed versions and status.
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
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-26640
- https://git.kernel.org/stable/c/1b8adcc0e2c584fec778add7777fe28e20781e60
- https://git.kernel.org/stable/c/577e4432f3ac810049cb7e6b71f4d96ec7c6e894
- https://git.kernel.org/stable/c/718f446e60316bf606946f7f42367d691d21541e
- https://git.kernel.org/stable/c/b383d4ea272fe5795877506dcce5aad1f6330e5e
- https://git.kernel.org/stable/c/d15cc0f66884ef2bed28c7ccbb11c102aa3a0760
- https://git.kernel.org/stable/c/f48bf9a83b1666d934247cb58a9887d7b3127b6f
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html