CVE-2026-31663 (GCVE-0-2026-31663)
Vulnerability from cvelistv5 – Published: 2026-04-24 14:45 – Updated: 2026-09-18 12:04
VLAI
EPSS
VEX
Title
xfrm: hold dev ref until after transport_finish NF_HOOK
Summary
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.
Severity
CWE
- CWE-826 - Premature Release of Resource During Expected Lifetime
Assigner
References
11 references
| URL | Tags |
|---|---|
| https://git.kernel.org/stable/c/4236c30b437b80f67… | |
| https://git.kernel.org/stable/c/0f451b43c88bf2b9c… | |
| https://git.kernel.org/stable/c/5002beda5cac69d52… | |
| https://git.kernel.org/stable/c/1c428b03840094410… | |
| https://access.redhat.com/security/cve/CVE-2026-31663 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2461462 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:67471 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:68570 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:68531 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:68532 | vendor-advisoryx_refsource_REDHAT |
Impacted products
9 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
acf568ee859f098279eadf551612f103afdacb4e , < 4236c30b437b80f673b9e08c8fae38b8d471ac9e
(git)
Affected: acf568ee859f098279eadf551612f103afdacb4e , < 0f451b43c88bf2b9c038b414be580efee42e031b (git) Affected: acf568ee859f098279eadf551612f103afdacb4e , < 5002beda5cac69d522dc54da0d5d463ed9c963d2 (git) Affected: acf568ee859f098279eadf551612f103afdacb4e , < 1c428b03840094410c5fb6a5db30640486bbbfcb (git) Affected: 69895c5ea0ca2e8d7de1e6d36965d0ab9730787f (git) Affected: 833760100588acfb267dac4d6a02ab9931237739 (git) Affected: e095ecaec6d94aa2156cceb98a85d409b51190f3 (git) Affected: 3.2.100 , < 3.3 (semver) Affected: 3.16.55 , < 3.17 (semver) Affected: 4.14.24 , < 4.15 (semver) |
guessed | |
| Linux | Linux |
Affected:
4.15
Unaffected: 0 , < 4.15 (semver) Unaffected: 6.12.94 , ≤ 6.12.* (semver) Unaffected: 6.18.23 , ≤ 6.18.* (semver) Unaffected: 6.19.13 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix) |
guessed | |
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:6.12.0-211.55.1.el10_2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
||
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
0:4.18.0-553.164.1.rt7.505.el8_10 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8::nfv |
||
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
0:4.18.0-553.164.1.el8_10 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:8 |
||
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:5.14.0-687.49.1.el9_8 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 cpe:/o:redhat:enterprise_linux:9 |
||
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
||
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
||
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9
|
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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