What is CVE-2024-26640?

CVE-2024-26640 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10. CVE-2024-26640 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2024-26640?

CVE-2024-26640 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2024-26640?

No patch is currently available for CVE-2024-26640. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2024-26640 actively exploited?

CVE-2024-26640 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2024-26640

Medium

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)

Package Linux Kernel

Published 2024-03-18

Last modified 2025-03-10

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

The following references provide additional information about CVE-2024-26640 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Debian Security
https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html

Mailing List
Kernel patch commit
https://git.kernel.org/stable/c/1b8adcc0e2c584fec778add7777fe28e20781e60
Patch
Kernel patch commit
https://git.kernel.org/stable/c/577e4432f3ac810049cb7e6b71f4d96ec7c6e894
Patch
Kernel patch commit
https://git.kernel.org/stable/c/718f446e60316bf606946f7f42367d691d21541e
Patch

6 patch commits total View all on NVD

Details

CVE ID CVE-2024-26640

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-03-18

Modified 2025-03-10

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2024-26640?

CVE-2024-26640 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . CVE-2024-26640 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2024-26640?

CVE-2024-26640 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2024-26640?

No patch is currently available for CVE-2024-26640. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2024-26640 actively exploited?

No — CVE-2024-26640 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.