CVE-2026-98489net: atl1c: fix soft lockup on out-of-range tpd_cons read
- —Not scoredno CVSS score yet
- 0.18%Exploitation in 30 daysEPSS · top 93% 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: net: atl1c: fix soft lockup on out-of-range tpd_cons read The hardware can report an out-of-range tpd_cons (seen as 0xffff) while the PCIe link/MAC is resetting. An out-of-range value can never be reached and the loop below would spin forever. To avoid a soft lockup treat it as "nothing new to clean" instead. Reproduced on two machines, same NIC (Qualcomm Atheros AR8151 v2.0, 4-port), triggered by rebooting a Mikrotik CCR2004 PCIe card that the ports are directly linked to: - Ubuntu 26.04.1 LTS, kernel 7.0.0-31-generic. The link-flap precursor, before the lockup was captured with a full trace elsewhere: atl1c 0000:05:00.0 enp5s0f0: NETDEV WATCHDOG: CPU: 4: transmit queue 2 timed out 489984 ms atl1c 0000:05:00.0: MAC state machine can't be idle since disabled for 10ms second atl1c 0000:05:00.0: atl1c: enp5s0f0 NIC Link is Up<65535 Mbps Full Duplex> 65535 (0xffff) here is the same value tpd_cons reads back once the loop below gets stuck. - Proxmox VE, kernel 7.0.14-11-pve. Same NIC/trigger, this time caught by the soft lockup watchdog with a full stack trace: watchdog: BUG: soft lockup - CPU#12 stuck for 354s! [napi/eth%d-0:329] CPU: 12 UID: 0 PID: 329 Comm: napi/eth%d-0 Tainted: P O L 7.0.14-11-pve #1 PREEMPT(lazy) RIP: 0010:atl1c_clean_tx+0x142/0x2d0 [atl1c] Call Trace: <TASK> __napi_poll+0x32/0x1e0 napi_threaded_poll_loop+0x286/0x2e0 napi_threaded_poll+0xfd/0x140 kthread+0xf7/0x130 ret_from_fork+0x2da/0x3a0 ret_from_fork_asm+0x1a/0x30 </TASK>
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)
- 0.18% · top 93% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected 43250ddd75a35d1f7926d989a10fefd30c37eaa7 – < e7acd4cdeccbcdfd407adeb72b1eba14d1145b6f
- affected 43250ddd75a35d1f7926d989a10fefd30c37eaa7 – < 5ea2576a4f5ec476f33169fdbe9090d2b038ad13
- affected 43250ddd75a35d1f7926d989a10fefd30c37eaa7 – < 4daf80da0c38b8cd92c111ad96cb38322aabf586
- affected 43250ddd75a35d1f7926d989a10fefd30c37eaa7 – < 57b55367b6e3accc55a989afeaf127063e3614dc
- affected 43250ddd75a35d1f7926d989a10fefd30c37eaa7 – < 9f2cc71a2e2799d9c993c73f1bd36507eef6ae43
- affected 43250ddd75a35d1f7926d989a10fefd30c37eaa7 – < 586847400b1168a88917287ac02c2c91a620b841
- affected 43250ddd75a35d1f7926d989a10fefd30c37eaa7 – < d4ab263e40fcf7cfa38a43ec774067d32eb94e16
- affected 43250ddd75a35d1f7926d989a10fefd30c37eaa7 – < 36c2009d90f2210ef92e6f4f2850e8b57b09e754
- affected 2.6.29
- unaffected < 2.6.29
- unaffected 5.10.271 – ≤ 5.10.*
- unaffected 5.15.222 – ≤ 5.15.*
- unaffected 6.1.189 – ≤ 6.1.*
- unaffected 6.6.158 – ≤ 6.6.*
- unaffected 6.12.112 – ≤ 6.12.*
- unaffected 6.18.55 – ≤ 6.18.*
- unaffected 7.2.9 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References8
- https://git.kernel.org/stable/c/e7acd4cdeccbcdfd407adeb72b1eba14d1145b6f (opens in a new tab)
- https://git.kernel.org/stable/c/5ea2576a4f5ec476f33169fdbe9090d2b038ad13 (opens in a new tab)
- https://git.kernel.org/stable/c/4daf80da0c38b8cd92c111ad96cb38322aabf586 (opens in a new tab)
- https://git.kernel.org/stable/c/57b55367b6e3accc55a989afeaf127063e3614dc (opens in a new tab)
- https://git.kernel.org/stable/c/9f2cc71a2e2799d9c993c73f1bd36507eef6ae43 (opens in a new tab)
- https://git.kernel.org/stable/c/586847400b1168a88917287ac02c2c91a620b841 (opens in a new tab)
- https://git.kernel.org/stable/c/d4ab263e40fcf7cfa38a43ec774067d32eb94e16 (opens in a new tab)
- https://git.kernel.org/stable/c/36c2009d90f2210ef92e6f4f2850e8b57b09e754 (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-2026-103729 (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-2026-98489)Record last updated .