ipv6: fix possible UAF in ip6_finish_output2()
Priority LOW 36CWE-416Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 3 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.
Summary
In the Linux kernel, the following vulnerability has been resolved: ipv6: fix possible UAF in ip6_finish_output2() If skb_expand_head() returns NULL, skb has been freed and associated dst/idev could also have been freed. We need to hold rcu_read_lock() to make sure the dst and associated idev are alive.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00722 54th percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.4.289, 5.10.233, 5.14 +5Red Hat: 3 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 5.4.137 to before 5.4.289; 5.10.55 to before 5.10.233; 5.13.7 to before 5.14 | 5.4.289, 5.10.233, 5.14 | Patch available | CNA |
| Linux | Linux | 5.14 and later | 5.4.289, 5.10.233, 5.15.166, 6.1.107, 6.6.48, 6.10.7, 6.11 | Patch available | CNA |
- Linux VendorLinux Affected 5.4.137 to before 5.4.289; 5.10.55 to before 5.10.233; 5.13.7 to before 5.14 Fixed in 5.4.289, 5.10.233, 5.14 Patch available CNA
- Linux VendorLinux Affected 5.14 and later Fixed in 5.4.289, 5.10.233, 5.15.166, 6.1.107, 6.6.48, 6.10.7, 6.11 Patch available CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* | 11.0 | Vulnerable | Debian |
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 5.4.137 to before 5.4.289; 5.10.55 to before 5.10.233; 5.13.7 to before 5.15.166; 5.16 to before 6.1.107; 6.2 to before 6.6.48; 6.7 to before 6.10.7 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:* | 6.11 rc1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.11:rc2:*:*:*:*:*:* | 6.11 rc2 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.11:rc3:*:*:*:*:*:* | 6.11 rc3 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.11:rc4:*:*:*:*:*:* | 6.11 rc4 | Vulnerable | Linux |
- cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·Debian
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 5.4.137 to before 5.4.289; 5.10.55 to before 5.10.233; 5.13.7 to before 5.15.166; 5.16 to before 6.1.107; 6.2 to before 6.6.48; 6.7 to before 6.10.7 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:* Versions 6.11 rc1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.11:rc2:*:*:*:*:*:* Versions 6.11 rc2 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.11:rc3:*:*:*:*:*:* Versions 6.11 rc3 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.11:rc4:*:*:*:*:*:* Versions 6.11 rc4 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.4.289, 5.10.233, 5.14
- Fix · CNA Linux (Linux) Fixed in 5.4.289, 5.10.233, 5.15.166, 6.1.107, 6.6.48, 6.10.7, 6.11
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 9 | Affected | No fix planned: Will not fix |
Not affected: 1 product
- Red Hat Enterprise Linux 8
Timeline
- 2026-10-02 Threatist record created from CVE-2024-44986
- 2026-10-03 Alias added: GHSA-x53w-73fx-jmfj
References
Patch 5
- https://git.kernel.org/stable/c/e891b36de161fcd96f12ff83667473e5067b9037
- https://git.kernel.org/stable/c/3574d28caf9a09756ae87ad1ea096c6f47b6101e
- https://git.kernel.org/stable/c/6ab6bf731354a6fdbaa617d1ec194960db61cf3b
- https://git.kernel.org/stable/c/56efc253196751ece1fc535a5b582be127b0578a
- https://git.kernel.org/stable/c/da273b377ae0d9bd255281ed3c2adb228321687b
More Linux Kernel vulnerabilities
- TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
- TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
- TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
- TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2024-44986 · CVE Program
- CVE-2024-44986 · NVD
- FIRST EPSS
- GHSA-x53w-73fx-jmfj · GitHub Advisory Database · CC BY 4.0
- CVE-2024-44986 · Red Hat security data · CC BY 4.0
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