Answer in brief
CVE-2026-64116 records a High severity (CVSS 7.5) vulnerability in ipv6: ioam: add NULL check for idev in ipv6_hop_ioam(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 <c7e8971abd70e9d022f1c251ba2508f8dc7f2db8 || >=9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 <09cbfd4b81ae90963dadb1de99b63b702e73290a || >=9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 <1dca7e491f070ac49b3d934f16ee953a53b37f38 || >=9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 <902daac307eb7e1955ce05b071950f3cba88c963 || >=9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 <abdd03229414b5a52943b65a60f34b84cea5ac59 || >=9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 <cf75eb6617042c8cff6112daeed7791809fc9dd2 || >=9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 <d4ea0dfd75011b78cebf3808f98ac4c4f51a6fb9 | c7e8971abd70e9d022f1c251ba2508f8dc7f2db8, 09cbfd4b81ae90963dadb1de99b63b702e73290a, 1dca7e491f070ac49b3d934f16ee953a53b37f38, 902daac307eb7e1955ce05b071950f3cba88c963, abdd03229414b5a52943b65a60f34b84cea5ac59, cf75eb6617042c8cff6112daeed7791809fc9dd2, d4ea0dfd75011b78cebf3808f98ac4c4f51a6fb9 |
| Linux/Linuxgeneric | 5.15 | Not reported |
Published upstream
Jul 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 12, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: ipv6: ioam: add NULL check for idev in ipv6_hop_ioam() Reported by Sashiko: The function ipv6_hop_ioam() accesses __in6_dev_get(skb->dev)->cnf.ioam6_enabled without validating the returned idev pointer. Because addrconf_ifdown() can concurrently clear dev->ip6_ptr via RCU, __in6_dev_get() can return NULL during interface teardown, which could cause a NULL pointer dereference when processing an IOAM Hop-by-Hop option. Let's add a check and use SKB_DROP_REASON_IPV6DISABLED accordingly.
Quoted source text, attributed separately from HOL analysis.