Answer in brief
CVE-2026-52915 records a High severity (CVSS 7.1) vulnerability in netfilter: ip6t_hbh: reject oversized option lists. 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-2026-52915 records a High severity (CVSS 7.1) vulnerability in netfilter: ip6t_hbh: reject oversized option lists. 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 7.1. 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 | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2d523ba48d4ecc46acfb6aba548292cfcce1ac02 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <588933f1a2ca5ff99274f8c9f25dc3a25d0191c3 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <784aadea7a108c9f90985683caa87fb0198c6a39 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <41ec2e242f1702e8370ddfe14d22b7a766021c3e || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <db0250470f023f159094052c0bd5ab026a88ae93 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <57b0ac5e1b46f1f0338dff392ef2092e2871b412 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6feb43c0995ab3a9c826707eb46541a1696fe4f7 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4322dcde6b4173c2d8e8e6118ed290794263bcc8 | 2d523ba48d4ecc46acfb6aba548292cfcce1ac02, 588933f1a2ca5ff99274f8c9f25dc3a25d0191c3, 784aadea7a108c9f90985683caa87fb0198c6a39, 41ec2e242f1702e8370ddfe14d22b7a766021c3e, db0250470f023f159094052c0bd5ab026a88ae93, 57b0ac5e1b46f1f0338dff392ef2092e2871b412, 6feb43c0995ab3a9c826707eb46541a1696fe4f7, 4322dcde6b4173c2d8e8e6118ed290794263bcc8 |
| Linux/Linuxgeneric | 2.6.12 | Not reported |
Published upstream
Jun 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 24, 2026
In the Linux kernel, the following vulnerability has been resolved: netfilter: ip6t_hbh: reject oversized option lists struct ip6t_opts stores at most IP6T_OPTS_OPTSNR option descriptors, but hbh_mt6_check() does not reject larger optsnr values supplied from userspace. Validate optsnr in the rule setup path so only match data that fits the fixed-size opts array can be installed. This follows the existing xtables pattern of rejecting invalid user-provided counts in checkentry() and keeps the packet matching path unchanged. `struct ip6t_opts` has a fixed `opts[IP6T_OPTS_OPTSNR]` array, where `IP6T_OPTS_OPTSNR` is 16, then off-by-one array access is possible: [ 137.924693][ T8692] UBSAN: array-index-out-of-bounds in ../net/ipv6/netfilter/ip6t_hbh.c:110:29 [ 137.926167][ T8692] index 16 is out of range for type '__u16 [16]'
Quoted source text, attributed separately from HOL analysis.
CVSS is 7.1. 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 | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2d523ba48d4ecc46acfb6aba548292cfcce1ac02 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <588933f1a2ca5ff99274f8c9f25dc3a25d0191c3 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <784aadea7a108c9f90985683caa87fb0198c6a39 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <41ec2e242f1702e8370ddfe14d22b7a766021c3e || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <db0250470f023f159094052c0bd5ab026a88ae93 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <57b0ac5e1b46f1f0338dff392ef2092e2871b412 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6feb43c0995ab3a9c826707eb46541a1696fe4f7 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4322dcde6b4173c2d8e8e6118ed290794263bcc8 | 2d523ba48d4ecc46acfb6aba548292cfcce1ac02, 588933f1a2ca5ff99274f8c9f25dc3a25d0191c3, 784aadea7a108c9f90985683caa87fb0198c6a39, 41ec2e242f1702e8370ddfe14d22b7a766021c3e, db0250470f023f159094052c0bd5ab026a88ae93, 57b0ac5e1b46f1f0338dff392ef2092e2871b412, 6feb43c0995ab3a9c826707eb46541a1696fe4f7, 4322dcde6b4173c2d8e8e6118ed290794263bcc8 |
| Linux/Linuxgeneric | 2.6.12 | Not reported |
Published upstream
Jun 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 24, 2026
In the Linux kernel, the following vulnerability has been resolved: netfilter: ip6t_hbh: reject oversized option lists struct ip6t_opts stores at most IP6T_OPTS_OPTSNR option descriptors, but hbh_mt6_check() does not reject larger optsnr values supplied from userspace. Validate optsnr in the rule setup path so only match data that fits the fixed-size opts array can be installed. This follows the existing xtables pattern of rejecting invalid user-provided counts in checkentry() and keeps the packet matching path unchanged. `struct ip6t_opts` has a fixed `opts[IP6T_OPTS_OPTSNR]` array, where `IP6T_OPTS_OPTSNR` is 16, then off-by-one array access is possible: [ 137.924693][ T8692] UBSAN: array-index-out-of-bounds in ../net/ipv6/netfilter/ip6t_hbh.c:110:29 [ 137.926167][ T8692] index 16 is out of range for type '__u16 [16]'
Quoted source text, attributed separately from HOL analysis.