Unknown severity · Source severity not reportedCVE-2026-23377

ice: change XDP RxQ frag_size from DMA write length to xdp.frame_szCVE-2026-23377

Answer in brief

CVE-2026-23377 records a Unknown severity vulnerability in ice: change XDP RxQ frag_size from DMA write length to xdp.frame_sz. 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.

Published Mar 25, 2026Updated Oct 21, 2026Source checked Oct 21, 2026First seen by HOL Oct 21, 2026Material review Oct 21, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

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.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=2fba7dc5157b6f85dbf1b8e26e63a724db1f3d79 <f2b29bbe355221a65c3eccf9500e5e33e4f1cb5c \|\| >=2fba7dc5157b6f85dbf1b8e26e63a724db1f3d79 <6aed180a44b1c0a3971107fa052a41b03acdb31e \|\| >=2fba7dc5157b6f85dbf1b8e26e63a724db1f3d79 <b0f05100e8795aadd1c0606bae9caefbda070d63 \|\| >=2fba7dc5157b6f85dbf1b8e26e63a724db1f3d79 <e142dc4ef0f451b7ef99d09aaa84e9389af629d7	f2b29bbe355221a65c3eccf9500e5e33e4f1cb5c, 6aed180a44b1c0a3971107fa052a41b03acdb31e, b0f05100e8795aadd1c0606bae9caefbda070d63, e142dc4ef0f451b7ef99d09aaa84e9389af629d7
Linux/Linuxgeneric	6.3	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to f2b29bbe355221a65c3eccf9500e5e33e4f1cb5c if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Mar 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 21, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 21, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: ice: change XDP RxQ frag_size from DMA write length to xdp.frame_sz The only user of frag_size field in XDP RxQ info is bpf_xdp_frags_increase_tail(). It clearly expects whole buff size instead of DMA write size. Different assumptions in ice driver configuration lead to negative tailroom. This allows to trigger kernel panic, when using XDP_ADJUST_TAIL_GROW_MULTI_BUFF xskxceiver test and changing packet size to 6912 and the requested offset to a huge value, e.g. XSK_UMEM__MAX_FRAME_SIZE * 100. Due to other quirks of the ZC configuration in ice, panic is not observed in ZC mode, but tailroom growing still fails when it should not. Use fill queue buffer truesize instead of DMA write size in XDP RxQ info. Fix ZC mode too by using the new helper.

Quoted source text, attributed separately from HOL analysis.