CVE - CVE-2024-44965

CVE-ID
CVE-2024-44965	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: x86/mm: Fix pti_clone_pgtable() alignment assumption Guenter reported dodgy crashes on an i386-nosmp build using GCC-11 that had the form of endless traps until entry stack exhaust and then #DF from the stack guard. It turned out that pti_clone_pgtable() had alignment assumptions on the start address, notably it hard assumes start is PMD aligned. This is true on x86_64, but very much not true on i386. These assumptions can cause the end condition to malfunction, leading to a 'short' clone. Guess what happens when the user mapping has a short copy of the entry text? Use the correct increment form for addr to avoid alignment assumptions.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/18da1b27ce16a14a9b636af9232acb4fb24f4c9e URL:https://git.kernel.org/stable/c/18da1b27ce16a14a9b636af9232acb4fb24f4c9e MISC:https://git.kernel.org/stable/c/25a727233a40a9b33370eec9f0cad67d8fd312f8 URL:https://git.kernel.org/stable/c/25a727233a40a9b33370eec9f0cad67d8fd312f8 MISC:https://git.kernel.org/stable/c/41e71dbb0e0a0fe214545fe64af031303a08524c URL:https://git.kernel.org/stable/c/41e71dbb0e0a0fe214545fe64af031303a08524c MISC:https://git.kernel.org/stable/c/4d143ae782009b43b4f366402e5c37f59d4e4346 URL:https://git.kernel.org/stable/c/4d143ae782009b43b4f366402e5c37f59d4e4346 MISC:https://git.kernel.org/stable/c/5c580c1050bcbc15c3e78090859d798dcf8c9763 URL:https://git.kernel.org/stable/c/5c580c1050bcbc15c3e78090859d798dcf8c9763 MISC:https://git.kernel.org/stable/c/ca07aab70dd3b5e7fddb62d7a6ecd7a7d6d0b2ed URL:https://git.kernel.org/stable/c/ca07aab70dd3b5e7fddb62d7a6ecd7a7d6d0b2ed MISC:https://git.kernel.org/stable/c/d00c9b4bbc442d99e1dafbdfdab848bc1ead73f6 URL:https://git.kernel.org/stable/c/d00c9b4bbc442d99e1dafbdfdab848bc1ead73f6 MISC:https://git.kernel.org/stable/c/df3eecb5496f87263d171b254ca6e2758ab3c35c URL:https://git.kernel.org/stable/c/df3eecb5496f87263d171b254ca6e2758ab3c35c
Assigning CNA
kernel.org
Date Record Created
20240821	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240821)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
This is an record on the CVE List, which provides common identifiers for publicly known cybersecurity vulnerabilities.
Search CVE Using Keywords: You can also search by reference using the CVE Reference Maps.
For More Information: CVE Request Web Form (select "Other" from dropdown)