Answer in brief
CVE-2026-64116 records a Unknown severity 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.
Answer in brief
CVE-2026-64116 records a Unknown severity 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.
A CVSS score is not reported in the current record. 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.
| 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 5, 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.
A CVSS score is not reported in the current record. 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.
| 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 5, 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.