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Linux KernelOperating system · Linux

CVE-2022-49722

HIGH · 7.8 CVSS v3.1 Published 2025-02-26
Fix available
A fix is available. Upgrade to 5.18.6 or later.
See remediation →
80/100
Remediation priority · High
Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
In the Linux kernel, the following vulnerability has been resolved: ice: Fix memory corruption in VF driver Disable VF's RX/TX queues, when it's disabled. VF can have queues enabled, when it requests a reset. If PF driver assumes that VF is disabled, while VF still has queues configured, VF may unmap DMA resources. In such scenario device still can map packets to memory, which ends up silently corrupting it. Previously, VF driver could experience memory corruption, which lead to crash: [ 5119.170157] BUG: unable to handle kernel paging request at 00001b9780003237 [ 5119.170166] PGD 0 P4D 0 [ 5119.170173] Oops: 0002 [#1] PREEMPT_RT SMP PTI [ 5119.170181] CPU: 30 PID: 427592 Comm: kworker/u96:2 Kdump: loaded Tainted: G W I --------- - - 4.18.0-372.9.1.rt7.166.el8.x86_64 #1 [ 5119.170189] Hardware name: Dell Inc. PowerEdge R740/014X06, BIOS 2.3.10 08/15/2019 [ 5119.170193] Workqueue: iavf iavf_adminq_task [iavf] [ 5119.170219] RIP: 0010:__page_frag_cache_drain+0x5/0x30 [ 5119.170238] Code: 0f 0f b6 77 51 85 f6 74 07 31 d2 e9 05 df ff ff e9 90 fe ff ff 48 8b 05 49 db 33 01 eb b4 0f 1f 80 00 00 00 00 0f 1f 44 00 00 <f0> 29 77 34 74 01 c3 48 8b 07 f6 c4 80 74 0f 0f b6 77 51 85 f6 74 [ 5119.170244] RSP: 0018:ffffa43b0bdcfd78 EFLAGS: 00010282 [ 5119.170250] RAX: ffffffff896b3e40 RBX: ffff8fb282524000 RCX: 0000000000000002 [ 5119.170254] RDX: 0000000049000000 RSI: 0000000000000000 RDI: 00001b9780003203 [ 5119.170259] RBP: ffff8fb248217b00 R08: 0000000000000022 R09: 0000000000000009 [ 5119.170262] R10: 2b849d6300000000 R11: 0000000000000020 R12: 0000000000000000 [ 5119.170265] R13: 0000000000001000 R14: 0000000000000009 R15: 0000000000000000 [ 5119.170269] FS: 0000000000000000(0000) GS:ffff8fb1201c0000(0000) knlGS:0000000000000000 [ 5119.170274] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 5119.170279] CR2: 00001b9780003237 CR3: 00000008f3e1a003 CR4: 00000000007726e0 [ 5119.170283] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 5119.170286] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 5119.170290] PKRU: 55555554 [ 5119.170292] Call Trace: [ 5119.170298] iavf_clean_rx_ring+0xad/0x110 [iavf] [ 5119.170324] iavf_free_rx_resources+0xe/0x50 [iavf] [ 5119.170342] iavf_free_all_rx_resources.part.51+0x30/0x40 [iavf] [ 5119.170358] iavf_virtchnl_completion+0xd8a/0x15b0 [iavf] [ 5119.170377] ? iavf_clean_arq_element+0x210/0x280 [iavf] [ 5119.170397] iavf_adminq_task+0x126/0x2e0 [iavf] [ 5119.170416] process_one_work+0x18f/0x420 [ 5119.170429] worker_thread+0x30/0x370 [ 5119.170437] ? process_one_work+0x420/0x420 [ 5119.170445] kthread+0x151/0x170 [ 5119.170452] ? set_kthread_struct+0x40/0x40 [ 5119.170460] ret_from_fork+0x35/0x40 [ 5119.170477] Modules linked in: iavf sctp ip6_udp_tunnel udp_tunnel mlx4_en mlx4_core nfp tls vhost_net vhost vhost_iotlb tap tun xt_CHECKSUM ipt_MASQUERADE xt_conntrack ipt_REJECT nf_reject_ipv4 nft_compat nft_counter nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables nfnetlink bridge stp llc rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace fscache sunrpc intel_rapl_msr iTCO_wdt iTCO_vendor_support dell_smbios wmi_bmof dell_wmi_descriptor dcdbas kvm_intel kvm irqbypass intel_rapl_common isst_if_common skx_edac irdma nfit libnvdimm x86_pkg_temp_thermal i40e intel_powerclamp coretemp crct10dif_pclmul crc32_pclmul ghash_clmulni_intel ib_uverbs rapl ipmi_ssif intel_cstate intel_uncore mei_me pcspkr acpi_ipmi ib_core mei lpc_ich i2c_i801 ipmi_si ipmi_devintf wmi ipmi_msghandler acpi_power_meter xfs libcrc32c sd_mod t10_pi sg mgag200 drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ice ahci drm libahci crc32c_intel libata tg3 megaraid_sas [ 5119.170613] i2c_algo_bit dm_mirror dm_region_hash dm_log dm_mod fuse [last unloaded: iavf] [ 5119.170627] CR2: 00001b9780003237

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis
How this class of weakness works · CWE-787

The program writes past the bounds of a buffer, overwriting adjacent memory an attacker can turn to their advantage. Crafted input can overwrite control data and redirect execution. Remediation is validating every index and length before a write, plus modern memory-safety mitigations.

General guidance for the out-of-bounds write class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Linux KernelOperating system
Affected:>= 5.5, < 5.18.6= 5.19

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 5.18.6 or later
Fixed in 5.18.6
Vendor patch git.kernel.org →
Recommended fix High confidence

Linux Kernel 5.18.6 or later, or Linux Kernel 5.19.x (after the fix commit)

  1. 1. Identify the current kernel version using 'uname -r'
  2. 2. Check if the current version is affected (versions 5.5 through 5.18.5, or exactly 5.19)
  3. 3. Plan for a system reboot as part of the kernel upgrade process
  4. 4. Update the system package manager to fetch available kernel packages
  5. 5. Install kernel version 5.18.6 or later (e.g., 5.18.7, 5.18.8, etc.) OR a 5.19.x version that includes the fix commit 1bb8253b1dd44cf004e12c333acc6f25ee286cf3
  6. 6. Update bootloader configuration if necessary (e.g., update-grub for GRUB)
  7. 7. Reboot the system to load the new kernel
  8. 8. Verify the new kernel version is running with 'uname -r'
Caveat Kernel upgrades may require system reboot and could introduce compatibility issues with third-party kernel modules; ensure dependent modules (like iavf) are compatible with the new kernel version

Generated from the published advisory — verify against the referenced sources before acting.

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $3,200. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2022-49722 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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