In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: Ensure safe user copy of completion record If CONFIG_HARDENED_USERCOPY is enabled, copying completion record from event log cache to user triggers a kernel bug. [ 1987.159822] usercopy: Kernel memory exposure attempt detected from SLUB object 'dsa0' (offset 74, size 31)! [ 1987.170845] ------------[ cut here ]------------ [ 1987.176086] kernel BUG at mm/usercopy.c:102! [ 1987.180946] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI [ 1987.186866] CPU: 17 PID: 528 Comm: kworker/17:1 Not tainted 6.8.0-rc2+ #5 [ 1987.194537] Hardware name: Intel Corporation AvenueCity/AvenueCity, BIOS BHSDCRB1.86B.2492.D03.2307181620 07/18/2023 [ 1987.206405] Workqueue: wq0.0 idxd_evl_fault_work [idxd] [ 1987.212338] RIP: 0010:usercopy_abort+0x72/0x90 [ 1987.217381] Code: 58 65 9c 50 48 c7 c2 17 85 61 9c 57 48 c7 c7 98 fd 6b 9c 48 0f 44 d6 48 c7 c6 b3 08 62 9c 4c 89 d1 49 0f 44 f3 e8 1e 2e d5 ff <0f> 0b 49 c7 c1 9e 42 61 9c 4c 89 cf 4d 89 c8 eb a9 66 66 2e 0f 1f [ 1987.238505] RSP: 0018:ff62f5cf20607d60 EFLAGS: 00010246 [ 1987.244423] RAX: 000000000000005f RBX: 000000000000001f RCX: 0000000000000000 [ 1987.252480] RDX: 0000000000000000 RSI: ffffffff9c61429e RDI: 00000000ffffffff [ 1987.260538] RBP: ff62f5cf20607d78 R08: ff2a6a89ef3fffe8 R09: 00000000fffeffff [ 1987.268595] R10: ff2a6a89eed00000 R11: 0000000000000003 R12: ff2a66934849c89a [ 1987.276652] R13: 0000000000000001 R14: ff2a66934849c8b9 R15: ff2a66934849c899 [ 1987.284710] FS: 0000000000000000(0000) GS:ff2a66b22fe40000(0000) knlGS:0000000000000000 [ 1987.293850] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1987.300355] CR2: 00007fe291a37000 CR3: 000000010fbd4005 CR4: 0000000000f71ef0 [ 1987.308413] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1987.316470] DR3: 0000000000000000 DR6: 00000000fffe07f0 DR7: 0000000000000400 [ 1987.324527] PKRU: 55555554 [ 1987.327622] Call Trace: [ 1987.330424] <TASK> [ 1987.332826] ? show_regs+0x6e/0x80 [ 1987.336703] ? die+0x3c/0xa0 [ 1987.339988] ? do_trap+0xd4/0xf0 [ 1987.343662] ? do_error_trap+0x75/0xa0 [ 1987.347922] ? usercopy_abort+0x72/0x90 [ 1987.352277] ? exc_invalid_op+0x57/0x80 [ 1987.356634] ? usercopy_abort+0x72/0x90 [ 1987.360988] ? asm_exc_invalid_op+0x1f/0x30 [ 1987.365734] ? usercopy_abort+0x72/0x90 [ 1987.370088] __check_heap_object+0xb7/0xd0 [ 1987.374739] __check_object_size+0x175/0x2d0 [ 1987.379588] idxd_copy_cr+0xa9/0x130 [idxd] [ 1987.384341] idxd_evl_fault_work+0x127/0x390 [idxd] [ 1987.389878] process_one_work+0x13e/0x300 [ 1987.394435] ? __pfx_worker_thread+0x10/0x10 [ 1987.399284] worker_thread+0x2f7/0x420 [ 1987.403544] ? _raw_spin_unlock_irqrestore+0x2b/0x50 [ 1987.409171] ? __pfx_worker_thread+0x10/0x10 [ 1987.414019] kthread+0x107/0x140 [ 1987.417693] ? __pfx_kthread+0x10/0x10 [ 1987.421954] ret_from_fork+0x3d/0x60 [ 1987.426019] ? __pfx_kthread+0x10/0x10 [ 1987.430281] ret_from_fork_asm+0x1b/0x30 [ 1987.434744] </TASK> The issue arises because event log cache is created using kmem_cache_create() which is not suitable for user copy. Fix the issue by creating event log cache with kmem_cache_create_usercopy(), ensuring safe user copy.

The remote Oracle Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2024-9315 advisory.

    - memcg: protect concurrent access to mem_cgroup_idr (Rafael Aquini) [RHEL-56254] {CVE-2024-43892}
    - bnxt_en: Fix double DMA unmapping for XDP_REDIRECT (Michal Schmidt) [RHEL-57259] {CVE-2024-44984}
    - dma: fix call order in dmam_free_coherent (Eder Zulian) [RHEL-54751] {CVE-2024-43856}
    - dmaengine: idxd: Avoid unnecessary destruction of file_ida (Jerry Snitselaar) [RHEL-44508]     {CVE-2024-38629}
    - tipc: Return non-zero value from tipc_udp_addr2str() on error (Xin Long) [RHEL-55074] {CVE-2024-42284}
    - net/mlx5e: SHAMPO, Fix invalid WQ linked list unlink (Michal Schmidt) [RHEL-57119] {CVE-2024-44970}
    - net/mlx5e: Fix CT entry update leaks of modify header context (Michal Schmidt) [RHEL-55628]     {CVE-2024-43864}
    - net/mlx5: Always drain health in shutdown callback (Michal Schmidt) [RHEL-55616] {CVE-2024-43866}
    - net/mlx5: Fix missing lock on sync reset reload (Michal Schmidt) [RHEL-55121] {CVE-2024-42268}
    - ionic: fix kernel panic in XDP_TX action (CKI Backport Bot) [RHEL-47730] {CVE-2024-40907}
    - r8169: Fix possible ring buffer corruption on fragmented Tx packets. (Izabela Bakollari) [RHEL-44037]     {CVE-2024-38586}
    - KVM: s390: fix validity interception issue when gisa is switched off (CKI Backport Bot) [RHEL-57197]     {CVE-2024-45005}
    - wifi: cfg80211: handle 2x996 RU allocation in cfg80211_calculate_bitrate_he() (Jose Ignacio Tornos     Martinez) [RHEL-55579] {CVE-2024-43879}
    - wifi: mac80211: fix NULL dereference at band check in starting tx ba session (Jose Ignacio Tornos     Martinez) [RHEL-56191] {CVE-2024-43911}
    - wifi: rtw89: Fix array index mistake in rtw89_sta_info_get_iter() (Jose Ignacio Tornos Martinez)     [RHEL-54805] {CVE-2024-43842}
    - gfs2: Fix NULL pointer dereference in gfs2_log_flush (Andrew Price) [RHEL-51559] {CVE-2024-42079}
    - x86/mm: Fix pti_clone_pgtable() alignment assumption (Rafael Aquini) [RHEL-57170] {CVE-2024-44965}
    - bnxt_en: Adjust logging of firmware messages in case of released token in __hwrm_send() (CKI Backport     Bot) [RHEL-47822] {CVE-2024-40919}
    - netfilter: tproxy: bail out if IP has been disabled on the device (Phil Sutter) [RHEL-44369]     {CVE-2024-36270}

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 8 / 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2024-12682 advisory.

    - dmaengine: idxd: add a write() method for applications to submit work (Nikhil Rao)  [Orabug: 36770955]     {CVE-2024-21823}
    - dmaengine: idxd: add a new security check to deal with a hardware erratum (Arjan van de Ven)  [Orabug:
    36770955]  {CVE-2024-21823}
    - VFIO: Add the SPR_DSA and SPR_IAX devices to the denylist (Arjan van de Ven)  [Orabug: 36770955]     {CVE-2024-21823}

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
211575	Oracle Linux 9 : kernel (ELSA-2024-9315)	Nessus	Oracle Linux Local Security Checks	high
210815	RHEL 9 : kernel (RHSA-2024:9315)	Nessus	Red Hat Local Security Checks	high
207914	Oracle Linux 8 / 9 : Unbreakable Enterprise kernel (ELSA-2024-12682)	Nessus	Oracle Linux Local Security Checks	high

Detections

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CVE-2024-26746

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Tenable Plugins

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