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NVD / CVE Program· CNA Linux

CVE-2024-26615: net/smc: fix illegal rmb_desc access in SMC-D connection dump

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.25% (FIRST EPSS).
  • 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.
  • Fixed version: Linux Linux 1fea9969b81c67d0cb1611d1b8b7d19049d937be, 27aea64838914c6122db5b8bd4bed865c9736f22, 5fed92ca32eafbfae8b6bee8ca34cca71c6a8b6d.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 1fea9969b81c67d0cb1611d1b8b7d19049d937be, 27aea64838914c6122db5b8bd4bed865c9736f22, 5fed92ca32eafbfae8b6bee8ca34cca71c6a8b6d or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: net/smc: fix illegal rmb_desc access in SMC-D connection dump A crash was found when dumping SMC-D connections. It can be reproduced by following steps: - run nginx/wrk test: smc_run nginx smc_run wrk -t 16 -c 1000 -d <duration> -H 'Connection: Close' <URL> - continuously dump SMC-D connections in parallel: watch -n 1 'smcss -D' BUG: kernel NULL pointer dereference, address: 0000000000000030 CPU: 2 PID: 7204 Comm: smcss Kdump: loaded Tainted: G E 6.7.0+ #55 RIP: 0010:__smc_diag_dump.constprop.0+0x5e5/0x620 [smc_diag] Call Trace: <TASK> ? __die+0x24/0x70 ? page_fault_oops+0x66/0x150 ? exc_page_fault+0x69/0x140 ? asm_exc_page_fault+0x26/0x30 ? __smc_diag_dump.constprop.0+0x5e5/0x620 [smc_diag] ? __kmalloc_node_track_caller+0x35d/0x430 ? __alloc_skb+0x77/0x170 smc_diag_dump_proto+0xd0/0xf0 [smc_diag] smc_diag_dump+0x26/0x60 [smc_diag] netlink_dump+0x19f/0x320 __netlink_dump_start+0x1dc/0x300 smc_diag_handler_dump+0x6a/0x80 [smc_diag] ? __pfx_smc_diag_dump+0x10/0x10 [smc_diag] sock_diag_rcv_msg+0x121/0x140 ? __pfx_sock_diag_rcv_msg+0x10/0x10 netlink_rcv_skb+0x5a/0x110 sock_diag_rcv+0x28/0x40 netlink_unicast+0x22a/0x330 netlink_sendmsg+0x1f8/0x420 __sock_sendmsg+0xb0/0xc0 ____sys_sendmsg+0x24e/0x300 ? copy_msghdr_from_user+0x62/0x80 ___sys_sendmsg+0x7c/0xd0 ? __do_fault+0x34/0x160 ? do_read_fault+0x5f/0x100 ? do_fault+0xb0/0x110 ? __handle_mm_fault+0x2b0/0x6c0 __sys_sendmsg+0x4d/0x80 do_syscall_64+0x69/0x180 entry_SYSCALL_64_after_hwframe+0x6e/0x76 It is possible that the connection is in process of being established when we dump it. Assumed that the connection has been registered in a link group by smc_conn_create() but the rmb_desc has not yet been initialized by smc_buf_create(), thus causing the illegal access to conn->rmb_desc. So fix it by checking before dump.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Mar 11, 2024
Updated
Jun 17, 2026
EPSS
0.2% · 17th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

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  • No public exploit code on record
  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

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 kernel4.19 and later · before 4.19.307
  • linux linux kernel4.20 and later · before 5.4.269
  • linux linux kernel5.5 and later · before 5.10.210
  • linux linux kernel5.11 and later · before 5.15.149
  • linux linux kernel5.16 and later · before 6.1.76
  • linux linux kernel6.2 and later · before 6.6.15
  • linux linux kernel6.7 and later · before 6.7.3
  • linux linux kernel6.8

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

    • 4.19affected
    • 4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d and later · before 27aea64838914c6122db5b8bd4bed865c9736f22affected · git
    • 4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d and later · before 1fea9969b81c67d0cb1611d1b8b7d19049d937beaffected · git
    • 4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d and later · before 5fed92ca32eafbfae8b6bee8ca34cca71c6a8b6daffected · git
    • 4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d and later · before 68b888d51ac82f2b96bf5e077a31d76afcdef25aaffected · git
    • 4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d and later · before 6994dba06321e3c48fdad0ba796a063d9d82183aaffected · git
    • 4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d and later · before a164c2922675d7051805cdaf2b07daffe44f20d9affected · git
    • 4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d and later · before 8f3f9186e5bb96a9c9654c41653210e3ea7e48a6affected · git
    • 4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d and later · before dbc153fd3c142909e564bb256da087e13fbf239caffected · git
    • before 4.19not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
AlmaLinux:9bpftoolbefore 7.4.0-503.16.1.el9_57.4.0-503.16.1.el9_5
AlmaLinux:9kernelbefore 5.14.0-503.16.1.el9_55.14.0-503.16.1.el9_5
AlmaLinux:9kernel-64kbefore 5.14.0-503.16.1.el9_55.14.0-503.16.1.el9_5
AlmaLinux:9kernel-64k-corebefore 5.14.0-503.16.1.el9_55.14.0-503.16.1.el9_5
AlmaLinux:9kernel-64k-debugbefore 5.14.0-503.16.1.el9_55.14.0-503.16.1.el9_5
AlmaLinux:9kernel-64k-debug-corebefore 5.14.0-503.16.1.el9_55.14.0-503.16.1.el9_5
AlmaLinux:9kernel-64k-debug-develbefore 5.14.0-503.16.1.el9_55.14.0-503.16.1.el9_5
AlmaLinux:9kernel-64k-debug-devel-matchedbefore 5.14.0-503.16.1.el9_55.14.0-503.16.1.el9_5
AlmaLinux:9kernel-64k-debug-modulesbefore 5.14.0-503.16.1.el9_55.14.0-503.16.1.el9_5
AlmaLinux:9kernel-64k-debug-modules-corebefore 5.14.0-503.16.1.el9_55.14.0-503.16.1.el9_5
AlmaLinux:9kernel-64k-debug-modules-extrabefore 5.14.0-503.16.1.el9_55.14.0-503.16.1.el9_5
AlmaLinux:9kernel-64k-develbefore 5.14.0-503.16.1.el9_55.14.0-503.16.1.el9_5
AlmaLinux:9kernel-64k-devel-matchedbefore 5.14.0-503.16.1.el9_55.14.0-503.16.1.el9_5
AlmaLinux:9kernel-64k-modulesbefore 5.14.0-503.16.1.el9_55.14.0-503.16.1.el9_5
AlmaLinux:9kernel-64k-modules-corebefore 5.14.0-503.16.1.el9_55.14.0-503.16.1.el9_5
AlmaLinux:9kernel-64k-modules-extrabefore 5.14.0-503.16.1.el9_55.14.0-503.16.1.el9_5
AlmaLinux:9kernel-abi-stablelistsbefore 5.14.0-503.16.1.el9_55.14.0-503.16.1.el9_5
AlmaLinux:9kernel-corebefore 5.14.0-503.16.1.el9_55.14.0-503.16.1.el9_5
AlmaLinux:9kernel-cross-headersbefore 5.14.0-503.16.1.el9_55.14.0-503.16.1.el9_5
AlmaLinux:9kernel-debugbefore 5.14.0-503.16.1.el9_55.14.0-503.16.1.el9_5
AlmaLinux:9kernel-debug-corebefore 5.14.0-503.16.1.el9_55.14.0-503.16.1.el9_5
AlmaLinux:9kernel-debug-develbefore 5.14.0-503.16.1.el9_55.14.0-503.16.1.el9_5
AlmaLinux:9kernel-debug-devel-matchedbefore 5.14.0-503.16.1.el9_55.14.0-503.16.1.el9_5
AlmaLinux:9kernel-debug-modulesbefore 5.14.0-503.16.1.el9_55.14.0-503.16.1.el9_5

+96

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • 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

Published before and after this one in the same product

  • ← EarlierCVE-2024-26612Mar 11, 2024 · netfs, fscache: Prevent Oops in fscache_put_cache()
    22Monitor
  • ← EarlierCVE-2024-26614Mar 11, 2024 · tcp: make sure init the accept_queue's spinlocks once
    31Monitor
  • Later →CVE-2024-26616Mar 11, 2024 · btrfs: scrub: avoid use-after-free when chunk length is not 64K aligned
    31Monitor

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 Linux1fea9969b81c67d0cb1611d1b8b7d19049d937beVendor (CNA)
Linux Linux27aea64838914c6122db5b8bd4bed865c9736f22Vendor (CNA)
Linux Linux5fed92ca32eafbfae8b6bee8ca34cca71c6a8b6dVendor (CNA)
Linux Linux68b888d51ac82f2b96bf5e077a31d76afcdef25aVendor (CNA)
Linux Linux6994dba06321e3c48fdad0ba796a063d9d82183aVendor (CNA)
Linux Linux8f3f9186e5bb96a9c9654c41653210e3ea7e48a6Vendor (CNA)
Linux Linuxa164c2922675d7051805cdaf2b07daffe44f20d9Vendor (CNA)
Linux Linuxdbc153fd3c142909e564bb256da087e13fbf239cVendor (CNA)
almalinux:bpftool7.4.0-503.16.1.el9_5 · AlmaLinux:9Package registry (OSV)
almalinux:kernel5.14.0-503.16.1.el9_5 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k5.14.0-503.16.1.el9_5 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-core5.14.0-503.16.1.el9_5 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug5.14.0-503.16.1.el9_5 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-core5.14.0-503.16.1.el9_5 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-devel5.14.0-503.16.1.el9_5 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-devel-matched5.14.0-503.16.1.el9_5 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules5.14.0-503.16.1.el9_5 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules-core5.14.0-503.16.1.el9_5 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules-extra5.14.0-503.16.1.el9_5 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-devel5.14.0-503.16.1.el9_5 · AlmaLinux:9Package registry (OSV)
debian:linux6.1.76-1 · Debian:12Package registry (OSV)
opensuse:dtb-aarch646.4.0-150600.23.17.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-64kb6.4.0-150600.23.17.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-debug6.4.0-150600.23.17.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-default6.4.0-150600.23.17.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-default-base6.4.0-150600.23.17.1.150600.12.6.2 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-docs6.4.0-150600.23.17.3 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-kvmsmall6.4.0-150600.23.17.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-obs-build6.4.0-150600.23.17.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-obs-qa6.4.0-150600.23.17.1 · openSUSE:Leap 15.6Package registry (OSV)

+24

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.

No history yet (it accumulates with the daily EPSS job).

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.

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.

—

Bug bounty scope

No known public program.

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

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

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-476 · NULL Pointer Dereference

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.

Change log

  1. Fix✗ → ✓

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

References

Show all references (9 more)

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

All records