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SUSE-SU-2024:3319-1

Опубликовано: 18 сент. 2024
Источник: suse-cvrf

Описание

Security update for the Linux Kernel RT (Live Patch 16 for SLE 15 SP5)

This update for the Linux Kernel 5.14.21-150500_13_58 fixes several issues.

The following security issues were fixed:

  • CVE-2024-40909: Fix a potential use-after-free in bpf_link_free() (bsc#1228349).
  • CVE-2023-52846: Prevent use after free in prp_create_tagged_frame() (bsc#1225099).
  • CVE-2024-26923: Fixed false-positive lockdep splat for spin_lock() in __unix_gc() (bsc#1223683).

Список пакетов

SUSE Linux Enterprise Live Patching 15 SP5
kernel-livepatch-5_14_21-150500_13_58-rt-3-150500.11.6.1

Ссылки

Описание

In the Linux kernel, the following vulnerability has been resolved: hsr: Prevent use after free in prp_create_tagged_frame() The prp_fill_rct() function can fail. In that situation, it frees the skb and returns NULL. Meanwhile on the success path, it returns the original skb. So it's straight forward to fix bug by using the returned value.

Затронутые продукты
SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_13_58-rt-3-150500.11.6.1
Ссылки

Описание

In the Linux kernel, the following vulnerability has been resolved: af_unix: Fix garbage collector racing against connect() Garbage collector does not take into account the risk of embryo getting enqueued during the garbage collection. If such embryo has a peer that carries SCM_RIGHTS, two consecutive passes of scan_children() may see a different set of children. Leading to an incorrectly elevated inflight count, and then a dangling pointer within the gc_inflight_list. sockets are AF_UNIX/SOCK_STREAM S is an unconnected socket L is a listening in-flight socket bound to addr, not in fdtable V's fd will be passed via sendmsg(), gets inflight count bumped connect(S, addr) sendmsg(S, [V]); close(V) __unix_gc() ---------------- ------------------------- ----------- NS = unix_create1() skb1 = sock_wmalloc(NS) L = unix_find_other(addr) unix_state_lock(L) unix_peer(S) = NS // V count=1 inflight=0 NS = unix_peer(S) skb2 = sock_alloc() skb_queue_tail(NS, skb2[V]) // V became in-flight // V count=2 inflight=1 close(V) // V count=1 inflight=1 // GC candidate condition met for u in gc_inflight_list: if (total_refs == inflight_refs) add u to gc_candidates // gc_candidates={L, V} for u in gc_candidates: scan_children(u, dec_inflight) // embryo (skb1) was not // reachable from L yet, so V's // inflight remains unchanged __skb_queue_tail(L, skb1) unix_state_unlock(L) for u in gc_candidates: if (u.inflight) scan_children(u, inc_inflight_move_tail) // V count=1 inflight=2 (!) If there is a GC-candidate listening socket, lock/unlock its state. This makes GC wait until the end of any ongoing connect() to that socket. After flipping the lock, a possibly SCM-laden embryo is already enqueued. And if there is another embryo coming, it can not possibly carry SCM_RIGHTS. At this point, unix_inflight() can not happen because unix_gc_lock is already taken. Inflight graph remains unaffected.

Затронутые продукты
SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_13_58-rt-3-150500.11.6.1
Ссылки

Описание

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix a potential use-after-free in bpf_link_free() After commit 1a80dbcb2dba, bpf_link can be freed by link->ops->dealloc_deferred, but the code still tests and uses link->ops->dealloc afterward, which leads to a use-after-free as reported by syzbot. Actually, one of them should be sufficient, so just call one of them instead of both. Also add a WARN_ON() in case of any problematic implementation.

Затронутые продукты
SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_13_58-rt-3-150500.11.6.1
Ссылки
Уязвимость SUSE-SU-2024:3319-1