CVE-2024-26640: tcp: add sanity checks to rx zerocopy
First published: Mon Mar 18 2024(Updated: )
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)
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <5.10.210 | 5.10.210 |
| redhat/kernel | <5.15.149 | 5.15.149 |
| redhat/kernel | <6.1.77 | 6.1.77 |
| redhat/kernel | <6.6.16 | 6.6.16 |
| redhat/kernel | <6.7.4 | 6.7.4 |
| redhat/kernel | <6.8 | 6.8 |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.119-1 6.11.10-1 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- 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://launchpad.net/bugs/cve/CVE-2024-26640
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
- https://git.kernel.org/linus/577e4432f3ac810049cb7e6b71f4d96ec7c6e894
- https://security-tracker.debian.org/tracker/CVE-2024-26640
- https://git.kernel.org/linus/577e4432f3ac810049cb7e6b71f4d96ec7c6e894 (6.8-rc3)
- https://www.cve.org/CVERecord?id=CVE-2024-26640
- https://ubuntu.com/security/notices/USN-6766-1
- https://ubuntu.com/security/notices/USN-6766-2
- https://ubuntu.com/security/notices/USN-6766-3
- https://ubuntu.com/security/notices/USN-6795-1
- https://ubuntu.com/security/notices/USN-6818-1
- https://ubuntu.com/security/notices/USN-6819-1
- https://ubuntu.com/security/notices/USN-6818-2
- https://ubuntu.com/security/notices/USN-6828-1
- https://ubuntu.com/security/notices/USN-6819-2
- https://ubuntu.com/security/notices/USN-6819-3
- https://ubuntu.com/security/notices/USN-6818-3
- https://ubuntu.com/security/notices/USN-6818-4
- https://ubuntu.com/security/notices/USN-6819-4
- https://nvd.nist.gov/vuln/detail/CVE-2024-26640
- https://git.kernel.org/linus/93ab6cc69162775201587cc9da00d5016dc890e2
- https://ubuntu.com/security/CVE-2024-26640
- agent/title
- agent/severity
- agent/type
- collector/epss-latest
- source/FIRST
- agent/epss
- agent/remedy
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- agent/author
- agent/last-modified-date
- agent/references
- collector/nvd-cve
- source/NVD
- agent/tags
- collector/mitre-cve
- source/MITRE
- collector/nvd-api
- collector/usn-cve
- source/Ubuntu
- agent/description
- agent/event
- collector/security-tracker-debian
- source/Debian
- agent/software-canonical-lookup
- agent/softwarecombine
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2024-26640
- package-manager/debian
- package-manager/redhat