VulnerabilityPublished 25 Mar 2026Updated 21 Oct 2026

CVE-2026-23377: Linux kernel · ice: change XDP RxQ frag_size from DMA write length to xdp.frame_sz

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in f2b29bbe355221a65c3eccf9500e5e33e4f1cb5c : update Linux kernel when convenient.

Data as of 26 Oct 2026, 13:47 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS: 0.1% chance of exploitation in 30 days – higher than 5% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in f2b29bbe355221a65c3eccf9500e5e33e4f1cb5c, e142dc4ef0f451b7ef99d09aaa84e9389af629d7, b0f05100e8795aadd1c0606bae9caefbda070d63 +1

Exploitation evidence

Disclosed: evidence found.
CVE published 25 Mar 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Linux kernel to f2b29bbe355221a65c3eccf9500e5e33e4f1cb5c, e142dc4ef0f451b7ef99d09aaa84e9389af629d7, b0f05100e8795aadd1c0606bae9caefbda070d63 or 6aed180a44b1c0a3971107fa052a41b03acdb31e.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 2fba7dc5157b6f85dbf1b8e26e63a724db1f3d79, < f2b29bbe355221a65c3eccf9500e5e33e4f1cb5c	Fixed in f2b29bbe355221a65c3eccf9500e5e33e4f1cb5c
LinuxLinux	Affected ≥ 2fba7dc5157b6f85dbf1b8e26e63a724db1f3d79, < e142dc4ef0f451b7ef99d09aaa84e9389af629d7	Fixed in e142dc4ef0f451b7ef99d09aaa84e9389af629d7
LinuxLinux	Affected ≥ 2fba7dc5157b6f85dbf1b8e26e63a724db1f3d79, < b0f05100e8795aadd1c0606bae9caefbda070d63	Fixed in b0f05100e8795aadd1c0606bae9caefbda070d63
LinuxLinux	Affected ≥ 2fba7dc5157b6f85dbf1b8e26e63a724db1f3d79, < 6aed180a44b1c0a3971107fa052a41b03acdb31e	Fixed in 6aed180a44b1c0a3971107fa052a41b03acdb31e
LinuxLinux	Affected =6.3	Fixed in–

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.

References

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