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SUSE-SU-2026:2191-1

Опубликовано: 01 июн. 2026
Источник: suse-cvrf

Описание

Security update for the Linux Kernel (Live Patch 50 for SUSE Linux Enterprise 15 SP4)

This update for the SUSE Linux Enterprise Kernel 5.14.21-150400.24.200 fixes various security issues

The following security issues were fixed:

  • CVE-2025-54518: AMD-SN-7052: CPU OP Cache Corruption (bsc#1264096).
  • CVE-2026-46300: FragNesia attack: another xfrm/esp based local root exploit (bsc#1265224).
  • CVE-2026-46333: ptrace: slightly saner 'get_dumpable()' logic (bsc#1265384).

Список пакетов

SUSE Linux Enterprise Live Patching 15 SP4
kernel-livepatch-5_14_21-150400_24_200-default-4-150400.2.1

Ссылки

Описание

Improper isolation of shared resources within the CPU operation cache on Zen 2-based products could allow an attacker to corrupt instructions executed at a different privilege level, potentially resulting in privilege escalation.

Затронутые продукты
SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_200-default-4-150400.2.1
Ссылки

Описание

In the Linux kernel, the following vulnerability has been resolved: net: skbuff: preserve shared-frag marker during coalescing skb_try_coalesce() can attach paged frags from @from to @to. If @from has SKBFL_SHARED_FRAG set, the resulting @to skb can contain the same externally-owned or page-cache-backed frags, but the shared-frag marker is currently lost. That breaks the invariant relied on by later in-place writers. In particular, ESP input checks skb_has_shared_frag() before deciding whether an uncloned nonlinear skb can skip skb_cow_data(). If TCP receive coalescing has moved shared frags into an unmarked skb, ESP can see skb_has_shared_frag() as false and decrypt in place over page-cache backed frags. Propagate SKBFL_SHARED_FRAG when skb_try_coalesce() transfers paged frags. The tailroom copy path does not need the marker because it copies bytes into @to's linear data rather than transferring frag descriptors.

Затронутые продукты
SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_200-default-4-150400.2.1
Ссылки

Описание

In the Linux kernel, the following vulnerability has been resolved: ptrace: slightly saner 'get_dumpable()' logic The 'dumpability' of a task is fundamentally about the memory image of the task - the concept comes from whether it can core dump or not - and makes no sense when you don't have an associated mm. And almost all users do in fact use it only for the case where the task has a mm pointer. But we have one odd special case: ptrace_may_access() uses 'dumpable' to check various other things entirely independently of the MM (typically explicitly using flags like PTRACE_MODE_READ_FSCREDS). Including for threads that no longer have a VM (and maybe never did, like most kernel threads). It's not what this flag was designed for, but it is what it is. The ptrace code does check that the uid/gid matches, so you do have to be uid-0 to see kernel thread details, but this means that the traditional "drop capabilities" model doesn't make any difference for this all. Make it all make a *bit* more sense by saying that if you don't have a MM pointer, we'll use a cached "last dumpability" flag if the thread ever had a MM (it will be zero for kernel threads since it is never set), and require a proper CAP_SYS_PTRACE capability to override.

Затронутые продукты
SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_200-default-4-150400.2.1
Ссылки