Answer in brief
CVE-2026-98479 records a High severity (CVSS 7.5) vulnerability in scsi: libiscsi_tcp: Check the data direction of a Data-In PDU. 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.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=a081c13e39b5c17052a7b46fafa61019c4c110ff <79991b770fc3685b1d5cf805b659a879edd19931 || >=a081c13e39b5c17052a7b46fafa61019c4c110ff <8db1232945bc663fb94f300090a1fc108de99296 || >=a081c13e39b5c17052a7b46fafa61019c4c110ff <94e5bdd08e51c450d954bc592f591c233ca5c9df || >=a081c13e39b5c17052a7b46fafa61019c4c110ff <de96dc11aee0d058927bff94a168e3c5c46483e2 || >=a081c13e39b5c17052a7b46fafa61019c4c110ff <e3b25bf2cf2496e85bc05b33360faf9fdf880e03 || >=a081c13e39b5c17052a7b46fafa61019c4c110ff <ee56b5e18f566c0b5a183379dcd63d402cebf2f8 || >=a081c13e39b5c17052a7b46fafa61019c4c110ff <24ffc919467d20951f0f132d1c75294e2e91e09b || >=a081c13e39b5c17052a7b46fafa61019c4c110ff <bce07e2f37b5e4a427d36fd6b1c14067b27591db | 79991b770fc3685b1d5cf805b659a879edd19931, 8db1232945bc663fb94f300090a1fc108de99296, 94e5bdd08e51c450d954bc592f591c233ca5c9df, de96dc11aee0d058927bff94a168e3c5c46483e2, e3b25bf2cf2496e85bc05b33360faf9fdf880e03, ee56b5e18f566c0b5a183379dcd63d402cebf2f8, 24ffc919467d20951f0f132d1c75294e2e91e09b, bce07e2f37b5e4a427d36fd6b1c14067b27591db |
| Linux/Linuxgeneric | 2.6.29 | Not reported |
Published upstream
Oct 18, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 18, 2026
In the Linux kernel, the following vulnerability has been resolved: scsi: libiscsi_tcp: Check the data direction of a Data-In PDU The Data-In branch of iscsi_tcp_hdr_dissect() resolves the ITT to a task and copies the PDU's data segment into that command's scatterlist without asking whether the command was reading. iscsi_tcp_r2t_rsp() in the same file does ask, and rejects an R2T for a command that is not DMA_TO_DEVICE. A target that answers a WRITE command's ITT with a Data-In therefore has the initiator write target-supplied bytes into the pages that write was about to send. Those are the caller's own pinned pages for an O_DIRECT write, and page cache pages for a buffered one. Observed against a test target that emits one 512-byte Data-In naming a 128 KB write's ITT, after the R2T for that write. With O_DIRECT the caller's buffer ends up holding 512 bytes of the target's data while pwrite() returns 131072. Buffered is quieter: pwrite() and fsync() both succeed, nothing is logged, and reading those blocks back returns the target's bytes out of the page cache without a command going on the wire. Check the direction before using the scatterlist, the way the R2T path already does.
Quoted source text, attributed separately from HOL analysis.