5.5

CVE-2024-44965

x86/mm: Fix pti_clone_pgtable() alignment assumption

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 4.19 < 4.19.320
Linux ≫ Linux Kernel Version >= 4.20 < 5.4.282
Linux ≫ Linux Kernel Version >= 5.5 < 5.10.224
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.165
Linux ≫ Linux Kernel Version >= 5.16 < 6.1.105
Linux ≫ Linux Kernel Version >= 6.2 < 6.6.46
Linux ≫ Linux Kernel Version >= 6.7 < 6.10.5
Linux ≫ Linux Kernel Version6.11 Updaterc1
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.22% 0.127
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/18da1b27ce16a14a9b636af9232acb4fb24f4c9e
Patch
https://git.kernel.org/stable/c/25a727233a40a9b33370eec9f0cad67d8fd312f8
Patch
https://git.kernel.org/stable/c/41e71dbb0e0a0fe214545fe64af031303a08524c
Patch
https://git.kernel.org/stable/c/4d143ae782009b43b4f366402e5c37f59d4e4346
Patch
https://git.kernel.org/stable/c/5c580c1050bcbc15c3e78090859d798dcf8c9763
Patch
https://git.kernel.org/stable/c/ca07aab70dd3b5e7fddb62d7a6ecd7a7d6d0b2ed
Patch
https://git.kernel.org/stable/c/d00c9b4bbc442d99e1dafbdfdab848bc1ead73f6
Patch
https://git.kernel.org/stable/c/df3eecb5496f87263d171b254ca6e2758ab3c35c
Patch
https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html
https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html