Answer in brief
CVE-2026-63926 records a High severity (CVSS 8.4) vulnerability in bpf: sockmap: fix tail fragment offset in bpf_msg_push_data. 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 8.4. 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 |
| cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=6fff607e2f14bd7c63c06c464a6f93b8efbabe28 <f14609d8146707452e0822f3c8154674ce677251 || >=6fff607e2f14bd7c63c06c464a6f93b8efbabe28 <d81b323af2dcee47573907ccb89c0df9b45cb2e2 || >=6fff607e2f14bd7c63c06c464a6f93b8efbabe28 <aeb95146848d12206e1b2cfacd4f40e21ce81d94 || >=6fff607e2f14bd7c63c06c464a6f93b8efbabe28 <96b72672ce849a1402730238e64d9b20bf06a96d || >=6fff607e2f14bd7c63c06c464a6f93b8efbabe28 <3075c21d2d76c0067f4a382765b43d6cc10470f1 || >=6fff607e2f14bd7c63c06c464a6f93b8efbabe28 <5e19028667963fb371ebb00cecc2a473ef92056b || >=6fff607e2f14bd7c63c06c464a6f93b8efbabe28 <63f64a510c7917658ddf4d073ece73914ee25346 || >=6fff607e2f14bd7c63c06c464a6f93b8efbabe28 <f72eed9b84fb771019a955908132410a9ba9ea3f | f14609d8146707452e0822f3c8154674ce677251, d81b323af2dcee47573907ccb89c0df9b45cb2e2, aeb95146848d12206e1b2cfacd4f40e21ce81d94, 96b72672ce849a1402730238e64d9b20bf06a96d, 3075c21d2d76c0067f4a382765b43d6cc10470f1, 5e19028667963fb371ebb00cecc2a473ef92056b, 63f64a510c7917658ddf4d073ece73914ee25346, f72eed9b84fb771019a955908132410a9ba9ea3f |
| Linux/Linuxgeneric | 4.20 | Not reported |
Published upstream
Jul 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 22, 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: bpf: sockmap: fix tail fragment offset in bpf_msg_push_data When bpf_msg_push_data() inserts data in the middle of a scatterlist entry, it splits the original entry into a left fragment and a right fragment. The right fragment offset is page-local, but the code advances it with `start`, which is the message-global insertion point. For inserts into a non-first SG entry, this over-advances the offset and leaves the split layout inconsistent. Advance the right fragment offset by the fragment-local delta, `start - offset`, which matches the length removed from the front of the original entry.
Quoted source text, attributed separately from HOL analysis.