CVE-2024-26640 Affecting kernel-debug package, versions <0:5.14.0-427.42.1.el9_4
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Test your applications- Snyk ID SNYK-ALMALINUX9-KERNELDEBUG-8334459
- published 4 Nov 2024
- disclosed 30 Oct 2024
How to fix?
Upgrade AlmaLinux:9
kernel-debug
to version 0:5.14.0-427.42.1.el9_4 or higher.
This issue was patched in ALSA-2024:8617
.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-debug
package and not the kernel-debug
package as distributed by AlmaLinux
.
See How to fix?
for AlmaLinux:9
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://errata.almalinux.org/8/ALSA-2024-5101.html
- https://errata.almalinux.org/8/ALSA-2024-5102.html
- https://errata.almalinux.org/9/ALSA-2024-8617.html
- https://access.redhat.com/security/cve/CVE-2024-26640
- https://access.redhat.com/errata/RHSA-2024:5101
- https://access.redhat.com/errata/RHSA-2024:5102
- https://access.redhat.com/errata/RHSA-2024:8617
- 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