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ALSA-2024:5101 — Important: kernel security update

Affected: AlmaLinux:8: bpftool, AlmaLinux:8: kernel, AlmaLinux:8: kernel-abi-stablelists, AlmaLinux:8: kernel-core, AlmaLinux:8: kernel-cross-headers, AlmaLinux:8: kernel-debug, AlmaLinux:8: kernel-debug-core, AlmaLinux:8: kernel-debug-devel, AlmaLinux:8: kernel-debug-modules, AlmaLinux:8: kernel-debug-modules-extra and 15 more

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

* kernel: powerpc: Fix access beyond end of drmem array (CVE-2023-52451) * kernel: efivarfs: force RO when remounting if SetVariable is not supported (CVE-2023-52463) * kernel: tracing: Restructure trace_clock_global() to never block (CVE-2021-46939) * kernel: ext4: avoid online resizing failures due to oversized flex bg (CVE-2023-52622) * kernel: net/sched: flower: Fix chain template offload (CVE-2024-26669) * kernel: stmmac: Clear variable when destroying workqueue (CVE-2024-26802) * kernel: efi: runtime: Fix potential overflow of soft-reserved region size (CVE-2024-26843) * kernel: quota: Fix potential NULL pointer dereference (CVE-2024-26878) * kernel: TIPC message reassembly use-after-free remote code execution vulnerability (CVE-2024-36886) * kernel: SUNRPC: fix a memleak in gss_import_v2_context (CVE-2023-52653) * kernel: dmaengine/idxd: hardware erratum allows potential security problem with direct access by untrusted application (CVE-2024-21823) * kernel: Revert "net/mlx5: Block entering switchdev mode with ns inconsistency" (CVE-2023-52658) * kernel: ext4: fix corruption during on-line resize (CVE-2024-35807) * kernel: x86/fpu: Keep xfd_state in sync with MSR_IA32_XFD (CVE-2024-35801) * kernel: dyndbg: fix old BUG_ON in >control parser (CVE-2024-35947) * kernel: net/sched: act_skbmod: prevent kernel-infoleak (CVE-2024-35893) * kernel: x86/mce: Make s…

bdu:2024-03703

BELL-CVE-2024-26921

Affected: Alpaquita:23: linux-lts, Alpaquita:25: linux-lts, Alpaquita:stream: linux-lts

certfr-2024-avi-0496 — De multiples vulnérabilités ont été découvertes dans le noyau Linux de SUSE. Certaines d'entre elles permettent à un at…

certfr-2024-avi-0496

EUVD-2026-345563

fkie_cve-2024-26921

In the Linux kernel, the following vulnerability has been resolved:

inet: inet_defrag: prevent sk release while still in use

ip_local_out() and other functions can pass skb->sk as function argument.

If the skb is a fragment and reassembly happens before such function call returns, the sk must not be released.

This affects skb fragments reassembled via netfilter or similar modules, e.g. openvswitch or ct_act.c, when run as part of tx pipeline.

Eric Dumazet made an initial analysis of this bug. Quoting Eric: Calling ip_defrag() in output path is also implying skb_orphan(), which is buggy because output path relies on sk not disappearing.

A relevant old patch about the issue was : 8282f27449bf ("inet: frag: Always orphan skbs inside ip_defrag()")

[..]

net/ipv4/ip_output.c depends on skb->sk being set, and probably to an inet socket, not an arbitrary one.

If we orphan the packet in ipvlan, then downstream things like FQ packet scheduler will not work properly.

We need to change ip_defrag() to only use skb_orphan() when really needed, ie whenever frag_list is going to be used.

Eric suggested to stash sk in fragment queue and made an initial patch. However there is a problem with this:

If skb is refragmented again right after, ip_do_fragment() will copy head->sk to the new fragments, and sets up destructor to sock_wfree. IOW, we have no choice but to fix up sk_wmem accouting to reflect the fully reassembled skb, else wmem will underflow.

This ch…

GHSA-4vg2-58j7-gmw7

In the Linux kernel, the following vulnerability has been resolved:

inet: inet_defrag: prevent sk release while still in use

ip_local_out() and other functions can pass skb->sk as function argument.

If the skb is a fragment and reassembly happens before such function call returns, the sk must not be released.

This affects skb fragments reassembled via netfilter or similar modules, e.g. openvswitch or ct_act.c, when run as part of tx pipeline.

Eric Dumazet made an initial analysis of this bug. Quoting Eric: Calling ip_defrag() in output path is also implying skb_orphan(), which is buggy because output path relies on sk not disappearing.

A relevant old patch about the issue was : 8282f27449bf ("inet: frag: Always orphan skbs inside ip_defrag()")

[..]

net/ipv4/ip_output.c depends on skb->sk being set, and probably to an inet socket, not an arbitrary one.

If we orphan the packet in ipvlan, then downstream things like FQ packet scheduler will not work properly.

We need to change ip_defrag() to only use skb_orphan() when really needed, ie whenever frag_list is going to be used.

Eric suggested to stash sk in fragment queue and made an initial patch. However there is a problem with this:

This ch…

gsd-2024-26921

OESA-2024-1622 — kernel security update

Affected: openEuler:22.03-LTS-SP3: kernel

The Linux Kernel, the operating system core itself. Security Fix(es): In the Linux kernel, the following vulnerability has been resolved: firmware: arm_scmi: Harden accesses to the reset domains Accessing reset domains descriptors by the index upon the SCMI drivers requests through the SCMI reset operations interface can potentially lead to out-of-bound violations if the SCMI driver misbehave. Add an internal consistency check before any such domains descriptors accesses.(CVE-2022-48655) In the Linux kernel, the following vulnerability has been resolved: erofs: fix pcluster use-after-free on UP platforms During stress testing with CONFIG_SMP disabled, KASAN reports as below: ================================================================== BUG: KASAN: use-after-free in __mutex_lock+0xe5/0xc30 Read of size 8 at addr ffff8881094223f8 by task stress/7789 CPU: 0 PID: 7789 Comm: stress Not tainted 6.0.0-rc1-00002-g0d53d2e882f9 #3 Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011 Call Trace: <TASK> .. __mutex_lock+0xe5/0xc30 .. z_erofs_do_read_page+0x8ce/0x1560 .. z_erofs_readahead+0x31c/0x580 .. Freed by task 7787 kasan_save_stack+0x1e/0x40 kasan_set_track+0x20/0x30 kasan_set_free_info+0x20/0x40 __kasan_slab_free+0x10c/0x190 kmem_cache_free+0xed/0x380 rcu_core+0x3d5/0xc90 __do_softirq+0x12d/0x389 Last potentially related work creation: kasan_save_stack+0x1e/0x40 __kasan_record_aux_stack+0x97/0xb0 call_rcu+0x3d/0x3f0 erofs_shr…

RHSA-2024:5101 — Red Hat Security Advisory: kernel security update

kernel: tracing: Restructure trace_clock_global() to never block kernel: ensure definition of the fixmap area is in a limit kernel: net: ieee802154: fix null deref in parse dev addr kernel: isdn: mISDN: netjet: Fix crash in nj_probe kernel: tcp: fix tcp_init_transfer() to not reset icsk_ca_initialized kernel: irqchip/gic-v3-its: Fix potential VPE leak on error kernel: netfilter: conntrack: serialize hash resizes and cleanups kernel: userfaultfd: fix a race between writeprotect and exit_mmap() kernel: isdn: mISDN: Fix sleeping function called from invalid context kernel: mm: khugepaged: skip huge page collapse for special files kernel: ethernet: hisilicon: hns: hns_dsaf_misc: fix a possible array overflow in hns_dsaf_ge_srst_by_port() kernel: ovl: fix warning in ovl_create_real() kernel: net/sunrpc: fix reference count leaks in rpc_sysfs_xprt_state_change kernel: i2c: mlxbf: prevent stack overflow in mlxbf_i2c_smbus_start_transaction() kernel: net: amd-xgbe: Fix skb data length underflow kernel: block: Fix wrong offset in bio_truncate() kernel: net: fix information leakage in /proc/net/ptype kernel: cifs: Fix memory leak when build ntlmssp negotiate blob failed kernel: x86/xen: Fix memory leak in xen_smp_intr_init{_pv}() kernel: Local information disclosure on Intel(R) Atom(R) processors kernel: powerpc: Fix access beyond end of drmem array kernel: efivarfs: force RO when remounting if SetVariable is not supported kernel: use-after-free in kv_parse_power_table kernel: null po…

RHSA-2024:5102 — Red Hat Security Advisory: kernel-rt security update

kernel: tracing: Restructure trace_clock_global() to never block kernel: net: ieee802154: fix null deref in parse dev addr kernel: isdn: mISDN: netjet: Fix crash in nj_probe kernel: tcp: fix tcp_init_transfer() to not reset icsk_ca_initialized kernel: irqchip/gic-v3-its: Fix potential VPE leak on error kernel: netfilter: conntrack: serialize hash resizes and cleanups kernel: userfaultfd: fix a race between writeprotect and exit_mmap() kernel: isdn: mISDN: Fix sleeping function called from invalid context kernel: mm: khugepaged: skip huge page collapse for special files kernel: ethernet: hisilicon: hns: hns_dsaf_misc: fix a possible array overflow in hns_dsaf_ge_srst_by_port() kernel: ovl: fix warning in ovl_create_real() kernel: net/sunrpc: fix reference count leaks in rpc_sysfs_xprt_state_change kernel: i2c: mlxbf: prevent stack overflow in mlxbf_i2c_smbus_start_transaction() kernel: net: amd-xgbe: Fix skb data length underflow kernel: block: Fix wrong offset in bio_truncate() kernel: net: fix information leakage in /proc/net/ptype kernel: efivarfs: force RO when remounting if SetVariable is not supported kernel: use-after-free in kv_parse_power_table kernel: null pointer dereference issues in ice_ptp.c kernel: drm: Don't unref the same fb many times by mistake due to deadlock handling kernel: wifi: mac80211: fix potential key use-after-free kernel: pstore/ram: Fix crash when setting number of cpus to an odd number kernel: ext4: avoid online resizing failures due to oversiz…

SUSE-SU-2024:1979-1 — Security update for the Linux Kernel

Security update for the Linux Kernel

UBUNTU-CVE-2024-26921

Affected: Ubuntu:Pro:14.04:LTS: linux-aws, Ubuntu:Pro:14.04:LTS: linux-azure, Ubuntu:Pro:14.04:LTS: linux-lts-xenial, Ubuntu:Pro:16.04:LTS: linux, Ubuntu:Pro:16.04:LTS: linux-aws, Ubuntu:Pro:16.04:LTS: linux-aws-hwe, Ubuntu:Pro:16.04:LTS: linux-azure, Ubuntu:Pro:16.04:LTS: linux-gcp, Ubuntu:Pro:16.04:LTS: linux-hwe, Ubuntu:Pro:16.04:LTS: linux-kvm and 176 more

In the Linux kernel, the following vulnerability has been resolved: inet: inet_defrag: prevent sk release while still in use ip_local_out() and other functions can pass skb->sk as function argument. If the skb is a fragment and reassembly happens before such function call returns, the sk must not be released. This affects skb fragments reassembled via netfilter or similar modules, e.g. openvswitch or ct_act.c, when run as part of tx pipeline. Eric Dumazet made an initial analysis of this bug. Quoting Eric: Calling ip_defrag() in output path is also implying skb_orphan(), which is buggy because output path relies on sk not disappearing. A relevant old patch about the issue was : 8282f27449bf ("inet: frag: Always orphan skbs inside ip_defrag()") [..] net/ipv4/ip_output.c depends on skb->sk being set, and probably to an inet socket, not an arbitrary one. If we orphan the packet in ipvlan, then downstream things like FQ packet scheduler will not work properly. We need to change ip_defrag() to only use skb_orphan() when really needed, ie whenever frag_list is going to be used. Eric suggested to stash sk in fragment queue and made an initial patch. However there is a problem with this: If skb is refragmented again right after, ip_do_fragment() will copy head->sk to the new fragments, and sets up destructor to sock_wfree. IOW, we have no choice but to fix up sk_wmem accouting to reflect the fully reassembled skb, else wmem will underflow. This change moves th…

WID-SEC-W-2024-0920 — Linux Kernel: Mehrere Schwachstellen

Ein lokaler Angreifer kann mehrere Schwachstellen im Linux-Kernel ausnutzen, um einen Denial-of-Service-Zustand herbeizuführen oder einen nicht spezifizierten Angriff durchzuführen.