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CVE-2024-26640

Status Candidate

Overview

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)

Related Files

Ubuntu Security Notice USN-7119-1
Posted Nov 20, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 7119-1 - Ziming Zhang discovered that the VMware Virtual GPU DRM driver in the Linux kernel contained an integer overflow vulnerability. A local attacker could use this to cause a denial of service. Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system.

tags | advisory, denial of service, overflow, kernel, local
systems | linux, ubuntu
advisories | CVE-2021-47188, CVE-2022-36402, CVE-2022-48863, CVE-2023-52531, CVE-2023-52614, CVE-2023-52918, CVE-2024-26607, CVE-2024-26640, CVE-2024-26641, CVE-2024-26668, CVE-2024-26669, CVE-2024-26677, CVE-2024-26885, CVE-2024-26960
SHA-256 | 0ac8232eca124498c64e1f39ff4a55d32797211ade5b92cbb09450e9c8fd78da
Ubuntu Security Notice USN-7088-3
Posted Nov 6, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 7088-3 - Ziming Zhang discovered that the VMware Virtual GPU DRM driver in the Linux kernel contained an integer overflow vulnerability. A local attacker could use this to cause a denial of service. Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system.

tags | advisory, denial of service, overflow, kernel, local
systems | linux, ubuntu
advisories | CVE-2021-47212, CVE-2022-36402, CVE-2023-52531, CVE-2023-52614, CVE-2023-52918, CVE-2024-26640, CVE-2024-26641, CVE-2024-26668, CVE-2024-26891, CVE-2024-38602, CVE-2024-38611, CVE-2024-40929, CVE-2024-41012, CVE-2024-41015
SHA-256 | 07a058d393aeb3ca0e8521b79d58db34aa38d2a713a564c2cb964636e33b13cc
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