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CVE-2022-50656· NVD / CVE Program· CNA Linux

nfc: pn533: Clear nfc_target before being used

In the Linux kernel, the following vulnerability has been resolved: nfc: pn533: Clear nfc_target before being used Fix a slab-out-of-bounds read that occurs in nla_put() called from nfc_genl_send_target() when target->sensb_res_len, which is duplicated from an nfc_target in pn533, is too large as the nfc_target is not properly initialized and retains garbage values. Clear nfc_targets with memset() before they are used. Found by a modified version of syzkaller. BUG: KASAN: slab-out-of-bounds in nla_put Call Trace: memcpy nla_put nfc_genl_dump_targets genl_lock_dumpit netlink_dump __netlink_dump_start genl_family_rcv_msg_dumpit genl_rcv_msg netlink_rcv_skb genl_rcv netlink_unicast netlink_sendmsg sock_sendmsg ____sys_sendmsg ___sys_sendmsg __sys_sendmsg do_syscall_64

HighCVSS 8.1 · v3.1—No exploit Fix available
Published
Dec 8, 2025
Updated
Aug 5, 2026
EPSS
0.3% · 25th percentile
CWE
—
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Report tools

JSON

Action score

32

Monitor

Low priority for now.

CVSS
32 / 40 · 8.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CNA vs NVD score

NVD
—
CNA · Linux
8.1
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Noroxi analysis

No Noroxi analysis for this record yet

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Affected systems

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Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 3.3affected
    • 361f3cb7f9cfdb82c80926d0e7843c098c034545 and later · before 9da4a0411f3455e3885831d0758bee3e3d565bbcaffected · git
    • 361f3cb7f9cfdb82c80926d0e7843c098c034545 and later · before 61a7e15d55fae329a245535c3bac494e401005b8affected · git
    • 361f3cb7f9cfdb82c80926d0e7843c098c034545 and later · before bef2f478513e7367ef3b05441f6afca981de29beaffected · git
    • 361f3cb7f9cfdb82c80926d0e7843c098c034545 and later · before 8bddef54cbe9ede5ac7478f1e1e968fcfe7e6f03affected · git
    • 361f3cb7f9cfdb82c80926d0e7843c098c034545 and later · before aea9e64dec2cc6cd742e07ecd4e6236fc76b389baffected · git
    • 361f3cb7f9cfdb82c80926d0e7843c098c034545 and later · before aae9c24ebd901f482e6c88b6f9e0c80dc5b536d6affected · git
    • 361f3cb7f9cfdb82c80926d0e7843c098c034545 and later · before 755019e37815a66bb0a23893debbd3dd640ccbd3affected · git
    • 361f3cb7f9cfdb82c80926d0e7843c098c034545 and later · before e491285b4d08884b622638be8e4961eb43b0af64affected · git
    • 361f3cb7f9cfdb82c80926d0e7843c098c034545 and later · before 9f28157778ede0d4f183f7ab3b46995bb400abbeaffected · git

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.4-16.1.4-1
SUSE:Linux Enterprise Live Patching 12 SP5kernel-defaultbefore 4.12.14-122.290.14.12.14-122.290.1
SUSE:Linux Enterprise Live Patching 12 SP5kgraft-patch-SLE12-SP5_Update_76before 1-8.7.11-8.7.1
SUSE:Linux Enterprise Server 12 SP5-LTSSkernel-sourcebefore 4.12.14-122.290.14.12.14-122.290.1
SUSE:Linux Enterprise Server 12 SP5-LTSSkernel-symsbefore 4.12.14-122.290.14.12.14-122.290.1

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan
  • CVE-2026-74309vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
    40Plan
  • CVE-2026-74280crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
    40Plan
  • CVE-2026-74279crypto: cavium/cpt - fix DMA cleanup using wrong loop index
    40Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux61a7e15d55fae329a245535c3bac494e401005b8Vendor (CNA)
Linux Linux755019e37815a66bb0a23893debbd3dd640ccbd3Vendor (CNA)
Linux Linux8bddef54cbe9ede5ac7478f1e1e968fcfe7e6f03Vendor (CNA)
Linux Linux9da4a0411f3455e3885831d0758bee3e3d565bbcVendor (CNA)
Linux Linux9f28157778ede0d4f183f7ab3b46995bb400abbeVendor (CNA)
Linux Linuxaae9c24ebd901f482e6c88b6f9e0c80dc5b536d6Vendor (CNA)
Linux Linuxaea9e64dec2cc6cd742e07ecd4e6236fc76b389bVendor (CNA)
Linux Linuxbef2f478513e7367ef3b05441f6afca981de29beVendor (CNA)
Linux Linuxe491285b4d08884b622638be8e4961eb43b0af64Vendor (CNA)
debian:linux6.1.4-1 · Debian:12Package registry (OSV)
suse:kernel-default4.12.14-122.290.1 · SUSE:Linux Enterprise Live Patching 12 SP5Package registry (OSV)
suse:kernel-source4.12.14-122.290.1 · SUSE:Linux Enterprise Server 12 SP5-LTSSPackage registry (OSV)
suse:kernel-syms4.12.14-122.290.1 · SUSE:Linux Enterprise Server 12 SP5-LTSSPackage registry (OSV)
suse:kgraft-patch-SLE12-SP5_Update_761-8.7.1 · SUSE:Linux Enterprise Live Patching 12 SP5Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

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Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone on the same network segment can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Adjacent
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
High

Weakness class (CWE)

—

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

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References

All records