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CVE-2025-71096· NVD / CVE Program· CNA Linux

RDMA/core: Check for the presence of LS_NLA_TYPE_DGID correctly

In the Linux kernel, the following vulnerability has been resolved: RDMA/core: Check for the presence of LS_NLA_TYPE_DGID correctly The netlink response for RDMA_NL_LS_OP_IP_RESOLVE should always have a LS_NLA_TYPE_DGID attribute, it is invalid if it does not. Use the nl parsing logic properly and call nla_parse_deprecated() to fill the nlattrs array and then directly index that array to get the data for the DGID. Just fail if it is NULL. Remove the for loop searching for the nla, and squash the validation and parsing into one function. Fixes an uninitialized read from the stack triggered by userspace if it does not provide the DGID to a kernel initiated RDMA_NL_LS_OP_IP_RESOLVE query. BUG: KMSAN: uninit-value in hex_byte_pack include/linux/hex.h:13 [inline] BUG: KMSAN: uninit-value in ip6_string+0xef4/0x13a0 lib/vsprintf.c:1490 hex_byte_pack include/linux/hex.h:13 [inline] ip6_string+0xef4/0x13a0 lib/vsprintf.c:1490 ip6_addr_string+0x18a/0x3e0 lib/vsprintf.c:1509 ip_addr_string+0x245/0xee0 lib/vsprintf.c:1633 pointer+0xc09/0x1bd0 lib/vsprintf.c:2542 vsnprintf+0xf8a/0x1bd0 lib/vsprintf.c:2930 vprintk_store+0x3ae/0x1530 kernel/printk/printk.c:2279 vprintk_emit+0x307/0xcd0 kernel/printk/printk.c:2426 vprintk_default+0x3f/0x50 kernel/printk/printk.c:2465 vprintk+0x36/0x50 kernel/printk/printk_safe.c:82 _printk+0x17e/0x1b0 kernel/printk/printk.c:2475 ib_nl_process_good_ip_rsep drivers/infiniband/core/addr.c:128 [inline] ib_nl_handle_ip_res_resp+0x963/0x9d0 drivers/infiniband/core/addr.c:141 rdma_nl_rcv_msg drivers/infiniband/core/netlink.c:-1 [inline] rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline] rdma_nl_rcv+0xefa/0x11c0 drivers/infiniband/core/netlink.c:259 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline] netlink_unicast+0xf04/0x12b0 net/netlink/af_netlink.c:1346 netlink_sendmsg+0x10b3/0x1250 net/netlink/af_netlink.c:1896 sock_sendmsg_nosec net/socket.c:714 [inline] __sock_sendmsg+0x333/0x3d0 net/socket.c:729 ____sys_sendmsg+0x7e0/0xd80 net/socket.c:2617 ___sys_sendmsg+0x271/0x3b0 net/socket.c:2671 __sys_sendmsg+0x1aa/0x300 net/socket.c:2703 __compat_sys_sendmsg net/compat.c:346 [inline] __do_compat_sys_sendmsg net/compat.c:353 [inline] __se_compat_sys_sendmsg net/compat.c:350 [inline] __ia32_compat_sys_sendmsg+0xa4/0x100 net/compat.c:350 ia32_sys_call+0x3f6c/0x4310 arch/x86/include/generated/asm/syscalls_32.h:371 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline] __do_fast_syscall_32+0xb0/0x150 arch/x86/entry/syscall_32.c:306 do_fast_syscall_32+0x38/0x80 arch/x86/entry/syscall_32.c:331 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/syscall_32.c:3

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Jan 13, 2026
Updated
Jun 17, 2026
EPSS
0.1% · 2th percentile
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Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Affected systems

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel4.7.1 and later · before 5.10.248
  • linux linux kernel5.11 and later · before 5.15.198
  • linux linux kernel5.16 and later · before 6.1.160
  • linux linux kernel6.2 and later · before 6.6.120
  • linux linux kernel6.7 and later · before 6.12.64
  • linux linux kernel6.13 and later · before 6.18.4
  • linux linux kernel4.7
  • linux linux kernel6.19

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

    • 4.7affected
    • ae43f8286730d1f2d241c34601df59f6d2286ac4 and later · before 376f46c8983458ead26cac83aa897a0b78491831affected · git
    • ae43f8286730d1f2d241c34601df59f6d2286ac4 and later · before bfe10318fc23e0b3f1d0a18dad387d29473a624daffected · git
    • ae43f8286730d1f2d241c34601df59f6d2286ac4 and later · before 45532638de5da24c201aa2a9b3dd4b054064de7baffected · git
    • ae43f8286730d1f2d241c34601df59f6d2286ac4 and later · before 9d85524789c2f17c0e87de8d596bcccc3683a1fcaffected · git
    • ae43f8286730d1f2d241c34601df59f6d2286ac4 and later · before acadd4097d25d6bd472bcb3f9f3eba2b5105d1ecaffected · git
    • ae43f8286730d1f2d241c34601df59f6d2286ac4 and later · before 0b948afc1ded88b3562c893114387f34389eeb94affected · git
    • ae43f8286730d1f2d241c34601df59f6d2286ac4 and later · before a7b8e876e0ef0232b8076972c57ce9a7286b47caaffected · git
    • before 4.7not affected · semver
    • 5.10.248 and later · up to and including 5.10.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.162-16.1.162-1
Debian:13linuxbefore 6.12.69-16.12.69-1
Debian:14linuxbefore 6.18.5-16.18.5-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now
  • CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV
    83Now
  • CVE-2019-13272In the Linux kernel before 5.1.17, ptrace_link in kernel/ptrace.c mishandles the recording of the credentials of a process that wants to creKEV
    77This week
  • CVE-2013-6282The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the v6k and v7 ARM platforms do not validate certain addKEV
    77This week
  • CVE-2013-2094The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9 uses an incorrect integer data type, which allows loKEV
    77This week

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 Linux0b948afc1ded88b3562c893114387f34389eeb94Vendor (CNA)
Linux Linux376f46c8983458ead26cac83aa897a0b78491831Vendor (CNA)
Linux Linux45532638de5da24c201aa2a9b3dd4b054064de7bVendor (CNA)
Linux Linux9d85524789c2f17c0e87de8d596bcccc3683a1fcVendor (CNA)
Linux Linuxa7b8e876e0ef0232b8076972c57ce9a7286b47caVendor (CNA)
Linux Linuxacadd4097d25d6bd472bcb3f9f3eba2b5105d1ecVendor (CNA)
Linux Linuxbfe10318fc23e0b3f1d0a18dad387d29473a624dVendor (CNA)
azl3 kernel 6.6.119.3-3 on Azure Linux 3.06.6.121.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.162-1 · Debian:12Package 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.

Credits

All researchers

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.

  • CVE-2024-50302421 days apartHID: core: zero-initialize the report bufferKEV
    52Plan
  • CVE-2026-52989162 days apartnvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers
    39Monitor
  • CVE-2026-53225163 days apartsctp: fix uninit-value in __sctp_rcv_asconf_lookup()
    36Monitor
  • CVE-2024-47685449 days apartnetfilter: nf_reject_ipv6: fix nf_reject_ip6_tcphdr_put()
    36Monitor
  • CVE-2026-53170163 days apartaccel/ethosu: reject DMA commands with uninitialized length
    35Monitor
  • CVE-2026-43139113 days apartxfrm6: fix uninitialized saddr in xfrm6_get_saddr()
    34Monitor

Chain candidates

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

—

Bug bounty scope

No known public program.

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

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

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

Weakness class (CWE)

CWE-908 · Use of Uninitialized Resource

CVSS vector

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

nvd-primary

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.

Noroxi analysis

No Noroxi analysis for this record yet

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Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records