CVE-2026-31663
xfrm: hold dev ref until after transport_finish NF_HOOK
Severity Score
7.8
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
In the Linux kernel, the following vulnerability has been resolved: xfrm: hold dev ref until after transport_finish NF_HOOK After async crypto completes, xfrm_input_resume() calls dev_put()
immediately on re-entry before the skb reaches transport_finish.
The skb->dev pointer is then used inside NF_HOOK and its okfn,
which can race with device teardown. Remove the dev_put from the async resumption entry and instead
drop the reference after the NF_HOOK call in transport_finish,
using a saved device pointer since NF_HOOK may consume the skb.
This covers NF_DROP, NF_QUEUE and NF_STOLEN paths that skip
the okfn. For non-transport exits (decaps, gro, drop) and secondary
async return points, release the reference inline when
async is set.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
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Integrity
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* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2026-03-09 CVE Reserved
- 2026-04-24 CVE Published
- 2026-04-30 EPSS Updated
- 2026-05-11 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
CAPEC
References (7)
| URL | Tag | Source |
|---|---|---|
| https://git.kernel.org/stable/c/acf568ee859f098279eadf551612f103afdacb4e | Vuln. Introduced | |
| https://git.kernel.org/stable/c/69895c5ea0ca2e8d7de1e6d36965d0ab9730787f | Vuln. Introduced | |
| https://git.kernel.org/stable/c/833760100588acfb267dac4d6a02ab9931237739 | Vuln. Introduced | |
| https://git.kernel.org/stable/c/e095ecaec6d94aa2156cceb98a85d409b51190f3 | Vuln. Introduced |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.15 < 6.18.23 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.15 < 6.18.23" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.15 < 6.19.13 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.15 < 6.19.13" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.15 < 7.0 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.15 < 7.0" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 3.2.100 Search vendor "Linux" for product "Linux Kernel" and version "3.2.100" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 3.16.55 Search vendor "Linux" for product "Linux Kernel" and version "3.16.55" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 4.14.24 Search vendor "Linux" for product "Linux Kernel" and version "4.14.24" | en |
Affected
| ||||||