CVE-2024-26961

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2024-05-01. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.8Exploit: NoneExposed: 0

A fix is available — apply it.

In the Linux kernel, the following vulnerability has been resolved:

mac802154: fix llsec key resources release in mac802154_llsec_key_del

mac802154_llsec_key_del() can free resources of a key directly without following the RCU rules for waiting before the end of a grace period. This may lead to use-after-free in case llsec_lookup_key() is traversing the list of keys in parallel with a key deletion:

refcount_t: addition on 0; use-after-free. WARNING: CPU: 4 PID: 16000 at lib/refcount.c:25 refcount_warn_saturate+0x162/0x2a0 Modules linked in: CPU: 4 PID: 16000 Comm: wpan-ping Not tainted 6.7.0 #19 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:refcount_warn_saturate+0x162/0x2a0 Call Trace: llsec_lookup_key.isra.0+0x890/0x9e0 mac802154_llsec_encrypt+0x30c/0x9c0 ieee802154_subif_start_xmit+0x24/0x1e0 dev_hard_start_xmit+0x13e/0x690 sch_direct_xmit+0x2ae/0xbc0 __dev_queue_xmit+0x11dd/0x3c20 dgram_sendmsg+0x90b/0xd60 __sys_sendto+0x466/0x4c0 __x64_sys_sendto+0xe0/0x1c0 do_syscall_64+0x45/0xf0 entry_SYSCALL_64_after_hwframe+0x6e/0x76

Also, ieee802154_llsec_key_entry structures are not freed by mac802154_llsec_key_del():

unreferenced object 0xffff8880613b6980 (size 64): comm "iwpan", pid 2176, jiffies 4294761134 (age 60.475s) hex dump (first 32 bytes): 78 0d 8f 18 80 88 ff ff 22 01 00 00 00 00 ad de x......."....... 00 00 00 00 00 00 00 00 03 00 cd ab 00 00 00 00 ................ backtrace: [] __kmem_cache_alloc_node+0x1e2/0x2d0 [] kmalloc_trace+0x25/0xc0 [] mac802154_llsec_key_add+0xac9/0xcf0 [] ieee802154_add_llsec_key+0x5a/0x80 [] nl802154_add_llsec_key+0x426/0x5b0 [] genl_family_rcv_msg_doit+0x1fe/0x2f0 [] genl_rcv_msg+0x531/0x7d0 [] netlink_rcv_skb+0x169/0x440 [] genl_rcv+0x28/0x40 [] netlink_unicast+0x53c/0x820 [] netlink_sendmsg+0x93b/0xe60 [] ____sys_sendmsg+0xac5/0xca0 [] ___sys_sendmsg+0x11d/0x1c0 [] __sys_sendmsg+0xfa/0x1d0 [] do_syscall_64+0x45/0xf0 [] entry_SYSCALL_64_after_hwframe+0x6e/0x76

Handle the proper resource release in the RCU callback function mac802154_llsec_key_del_rcu().

Note that if llsec_lookup_key() finds a key, it gets a refcount via llsec_key_get() and locally copies key id from key_entry (which is a list element). So it's safe to call llsec_key_put() and free the list entry after the RCU grace period elapses.

Found by Linux Verification Center (linuxtesting.org).

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
35(Track)
EG Risk 35/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
14.8%
KEV
Not listed

Published

May 1, 2024

Last Modified

May 12, 2026

Advisory Details (7)

Auto-updated May 12, 2026
No patch confirmed yet.
generic

mac802154: fix llsec key resources release in mac802154_llsec_key_del - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/49c8951680d7b76fceaee89dcfbab1363fb24fd1
generic

mac802154: fix llsec key resources release in mac802154_llsec_key_del - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/20d3e1c8a1847497269f04d874b2a5818ec29e2d
generic

mac802154: fix llsec key resources release in mac802154_llsec_key_del - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/068ab2759bc0b4daf0b964de61b2731449c86531
generic

mac802154: fix llsec key resources release in mac802154_llsec_key_del - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e8a1e58345cf40b7b272e08ac7b32328b2543e40
generic

mac802154: fix llsec key resources release in mac802154_llsec_key_del - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/dcd51ab42b7a0431575689c5f74b8b6efd45fc2f
generic

mac802154: fix llsec key resources release in mac802154_llsec_key_del - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d3d858650933d44ac12c1f31337e7110c2071821
generic

mac802154: fix llsec key resources release in mac802154_llsec_key_del - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/640297c3e897bd7e1481466a6a5cb9560f1edb88

Vendor Advisories for CVE-2024-26961(6)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(21)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-gke (6.8.0-1004.7) @ noble2026-05-22ubuntu
ubuntulinux-tools-lowlatency-hwe-20.04-edge (5.15.0.116.106) @ jammy2026-05-22ubuntu
ubuntulinux-tools-azure-lts-22.04 (5.15.0.1068.66) @ jammy2026-05-22ubuntu
ubuntulinux-tools-raspi-nolpae (5.15.0.1058.56) @ jammy2026-05-22ubuntu
ubuntulinux-tools-aws-edge (5.15.0.1065.71~20.04.1) @ focal2026-05-22ubuntu
ubuntulinux-tools-gcp-edge (5.15.0.1065.73~20.04.1) @ focal2026-05-22ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.116.126~20.04.1) @ focal2026-05-22ubuntu
ubuntulinux-xilinx-zynqmp-tools-host (5.15.0-1035.39) @ jammy2026-05-22ubuntu
ubuntulinux-virtual-hwe-24.04-edge (6.8.0-35.35) @ noble2026-05-22ubuntu
ubuntulinux-tools-oracle-64k (6.8.0-1006.6) @ noble2026-05-22ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.116.116) @ jammy2026-05-22ubuntu
ubuntulinux-tools-gcp (6.8.0-1008.9) @ noble2026-05-22ubuntu
ubuntulinux-tools-oem-24.04a (6.8.0-1006.6+1) @ noble2026-05-22ubuntu
redhatkernel-0:4.18.0-477.81.1.el8_82024-11-26redhat
redhatkernel-0:5.14.0-427.42.1.el9_42024-10-30redhat
redhatkernel-0:5.14.0-284.90.1.el9_22024-10-30redhat
redhatkernel-rt-0:5.14.0-284.90.1.rt14.375.el9_22024-10-30redhat
redhatkernel-0:4.18.0-553.16.1.el8_102024-08-08redhat
redhatkernel-rt-0:4.18.0-553.16.1.rt7.357.el8_102024-08-08redhat
redhatkernel-0:4.18.0-372.115.1.el8_62024-08-07redhat
linuxKernel @ 5.10.215—osv

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(15)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 11× in last 7d / 47× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 131 total refreshes for this CVE.

  1. 2026-07-23 02:35 UTCEG score recompute
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Frequently asked(5)

What is CVE-2024-26961?
CVE-2024-26961 is a high vulnerability published on May 1, 2024. In the Linux kernel, the following vulnerability has been resolved: mac802154: fix llsec key resources release in mac802154llseckey_del mac802154llseckey_del() can free resources of a key directly without following the RCU rules for waiting before the end of a grace period. This may lead to…
When was CVE-2024-26961 disclosed?
CVE-2024-26961 was first published in the National Vulnerability Database on May 1, 2024, with the most recent update on May 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-26961 actively exploited?
CVE-2024-26961 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 14.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2024-26961?
CVE-2024-26961 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2024-26961?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-26961, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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