Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected acf568ee859f098279eadf551612f103afdacb4e before 94439cbe478b53f92223da9aae95fffb28623c3f; affected acf568ee859f098279eadf551612f103afdacb4e before 4236c30b437b80f673b9e08c8fae38b8d471ac9e; affected acf568ee859f098279eadf551612f103afdacb4e before 0f451b43c88bf2b9c038b414be580efee42e031b; affected acf568ee859f098279eadf551612f103afdacb4e before 5002beda5cac69d522dc54da0d5d463ed9c963d2; affected acf568ee859f098279eadf551612f103afdacb4e before 1c428b03840094410c5fb6a5db30640486bbbfcb; affected 69895c5ea0ca2e8d7de1e6d36965d0ab9730787f; affected 833760100588acfb267dac4d6a02ab9931237739; affected e095ecaec6d94aa2156cceb98a85d409b51190f3; affected 3.2.100 before 3.3; affected 3.16.55 before 3.17; affected 4.14.24 before 4.15 |
| Linux / Linux | affected 4.15; unaffected 0 before 4.15; unaffected 6.6.160 through 6.6.*; unaffected 6.12.94 through 6.12.*; unaffected 6.18.23 through 6.18.*; unaffected 6.19.13 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/94439cbe478b53f92223da9aae95fffb28623c3f
- https://git.kernel.org/stable/c/4236c30b437b80f673b9e08c8fae38b8d471ac9e
- https://git.kernel.org/stable/c/0f451b43c88bf2b9c038b414be580efee42e031b
- https://git.kernel.org/stable/c/5002beda5cac69d522dc54da0d5d463ed9c963d2
- https://git.kernel.org/stable/c/1c428b03840094410c5fb6a5db30640486bbbfcb
ADP enrichment
A flaw was found in the Linux kernel's `xfrm` (IP eXtensible FRamework) subsystem. This vulnerability involves a race condition where a network device's reference is released too early during packet processing after asynchronous cryptography. This premature release can lead to the system attempting to access a deallocated device, potentially causing a system crash (Denial of Service).
- https://access.redhat.com/security/cve/CVE-2026-31663
- https://bugzilla.redhat.com/show_bug.cgi?id=2461462
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-31663.json
- https://access.redhat.com/errata/RHSA-2026:67471
- https://access.redhat.com/errata/RHSA-2026:68570
- https://access.redhat.com/errata/RHSA-2026:68531
- https://access.redhat.com/errata/RHSA-2026:68532
No English description supplied.
No references supplied.