CVE-2026-98615eth: fbnic: Set AW_FLUSH_MODE alongside AW_FLUSH when flushing the mailbox
- —Not scoredno CVSS score yet
- 0.17%Exploitation in 30 daysEPSS · top 94% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: eth: fbnic: Set AW_FLUSH_MODE alongside AW_FLUSH when flushing the mailbox When tearing down the FW mailbox Rx ring, fbnic_mbx_reset_desc_ring() writes AW_CFG with FLUSH set and everything else, BME included, cleared. Clearing BME halts the device's writes to the host but leaves the staged requests parked in the PUL write pipeline rather than draining them, so on the write path FLUSH alone never terminates the outstanding requests and the flush the firmware waits on never completes. Add the FLUSH_MODE definition and set both bits so the staged writes drain out of the pipeline on their own. BME stays cleared, so nothing lands on the host; it is restored later in fbnic_mbx_init_desc_ring() when the ring is rebuilt, once the outstanding writes are gone. The read path is unaffected. AR_CFG has no equivalent mode bit and AR_FLUSH terminates the outstanding reads by itself, so it is left as is. Both writes remain plain stores rather than read-modify-writes. That is deliberate: the matching write in fbnic_mbx_init_desc_ring() restores BME and the TLP attributes, and clears both flush bits as a side effect.
Timeline
ID reserved
By Linux
- 23 days later
· 23 days later
Published
- 1 day later
· 1 day later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.17% · top 94% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected fea860a2a6136658708fb530a82d59d29f708b74 – < ed4163f6ba9b52bfd6216d5215ee7b8eb5072411
- affected 3b12f00ddd08e888273b2ac0488d396d90a836fc – < 8a052cd4b2caee1f90cf0e3874377066939c90e7
- affected 3b12f00ddd08e888273b2ac0488d396d90a836fc – < a969db6548a1b046cd1423701f5f9c3f5794e90d
- affected 3b12f00ddd08e888273b2ac0488d396d90a836fc – < 8947f13e436a4ff5eed9f8f019b2865a07af4bb2
- affected 0a4aa8a32ddb96f320173a2e9b0e41f4a6d3746c
- affected 6.12.29 – < 6.12.112
- affected 6.14.7 – < 6.15
- affected 6.15
- unaffected < 6.15
- unaffected 6.12.112 – ≤ 6.12.*
- unaffected 6.18.55 – ≤ 6.18.*
- unaffected 7.2.9 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References4
- https://git.kernel.org/stable/c/ed4163f6ba9b52bfd6216d5215ee7b8eb5072411 (opens in a new tab)
- https://git.kernel.org/stable/c/8a052cd4b2caee1f90cf0e3874377066939c90e7 (opens in a new tab)
- https://git.kernel.org/stable/c/a969db6548a1b046cd1423701f5f9c3f5794e90d (opens in a new tab)
- https://git.kernel.org/stable/c/8947f13e436a4ff5eed9f8f019b2865a07af4bb2 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-103660 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-98615)Record last updated .