net: atl1c: fix soft lockup on out-of-range tpd_cons read
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: __napi_poll+0x32/0x1e0 napi_threaded_poll_loop+0x286/0x2e0 napi_threaded_poll+0xfd/0x140 kthread+0xf7/0x130 ret_from_fork+0x2da/0x3a0 ret_fro
CVE-2026-98489
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-98489
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "43250ddd75a35d1f7926d989a10fefd30c37eaa7",
"lessThan": "e7acd4cdeccbcdfd407adeb72b1eba14d1145b6f",
"versionType": "git"
},
{
"status": "affected",
"version": "43250ddd75a35d1f7926d989a10fefd30c37eaa7",
"lessThan": "5ea2576a4f5ec476f33169fdbe9090d2b038ad13",
"versionType": "git"
},
{
"status": "affected",
"version": "43250ddd75a35d1f7926d989a10fefd30c37eaa7",
"lessThan": "4daf80da0c38b8cd92c111ad96cb38322aabf586",
"versionType": "git"
},
{
"status": "affected",
"version": "43250ddd75a35d1f7926d989a10fefd30c37eaa7",
"lessThan": "57b55367b6e3accc55a989afeaf127063e3614dc",
"versionType": "git"
},
{
"status": "affected",
"version": "43250ddd75a35d1f7926d989a10fefd30c37eaa7",
"lessThan": "9f2cc71a2e2799d9c993c73f1bd36507eef6ae43",
"versionType": "git"
},
{
"status": "affected",
"version": "43250ddd75a35d1f7926d989a10fefd30c37eaa7",
"lessThan": "586847400b1168a88917287ac02c2c91a620b841",
"versionType": "git"
},
{
"status": "affected",
"version": "43250ddd75a35d1f7926d989a10fefd30c37eaa7",
"lessThan": "d4ab263e40fcf7cfa38a43ec774067d32eb94e16",
"versionType": "git"
},
{
"status": "affected",
"version": "43250ddd75a35d1f7926d989a10fefd30c37eaa7",
"lessThan": "36c2009d90f2210ef92e6f4f2850e8b57b09e754",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/ethernet/atheros/atl1c/atl1c_main.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.29"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.29",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.271",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.222",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.55",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.9",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/net/ethernet/atheros/atl1c/atl1c_main.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98489
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38532 · Revision 1
- Added to Heist Feed
- Publisher date