CVE-2026-74623: linux

CVSS: UnknownReceived
AliasesUBUNTU-CVE-2026-74623DEBIAN-CVE-2026-74623
Published 22-08-2026Last modified 23-08-2026
Open JSON

Vulnerability summary

CVE-2026-74623 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 6.8% of scored vulnerabilities.

Overall risk
0/100
0100
Minimal · default modelHow is this calculated?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
0.18%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1
MGASA-2026-0506

Timeline

  1. 22-08-2026
    PublishedVulnerability first disclosed.
  2. 23-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: net: atlantic: free stranded TX buffers on ring deinit aq_vec_deinit() drains the TX rings with a single aq_ring_tx_clean() call, which frees at most AQ_CFG_TX_CLEAN_BUDGET (256) descriptors and stops at hw_head, which no longer moves once aq_vec_stop() has stopped the hardware and NAPI. Completed descriptors beyond the budget and everything still posted in [hw_head, sw_tail) keep their skb or xdp_frame when the interface goes down: aq_vec_ring_free() then frees the buffer ring and the references are lost for good. Today this is a silent memory leak on every interface down under TX/XDP_TX load. With the conversion of the RX path to page_pool posted for net-next it becomes much more visible: XDP_TX frames carry fragment references on the RX ring's page_pool, so a single stranded frame keeps the pool's inflight count above zero forever. page_pool_destroy() then never completes, the pool is leaked together with its pages, and "page_pool_release_retry() stalled pool shutdown" is warned every 60 seconds from that point on, on every ifdown, XDP detach or ring resize under XDP_TX load. Bring back aq_ring_tx_deinit() as it was before the removal and use it for teardown again, with one extension: TX rings can hold xdp_frames nowadays, so release those too. They are returned with xdp_return_frame() since this runs in process context.

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.18%

Chance of exploitation in the next 30 days

Percentile

7%

Versus all other CVEs

30-day change

0.00 pp

From 0.18% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.18%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu168 products
  • linuxAll versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linux< 6.1.187-1 | < 6.12.105-1 | < 7.1.9-1
  • linux-6.12< 6.12.107-1~deb12u1
Linux1 product
  • linux≥ eb36bedf28be6d986bdbcfa375bab08ffa45efd8, < a14ceebd13bf857bfca052bc5a6bd49e737912be | ≥ eb36bedf28be6d986bdbcfa375bab08ffa45efd8, < 4f1c20873f70b4b22ef86dc38dad1fda8e169bcd | ≥ eb36bedf28be6d986bdbcfa375bab08ffa45efd8, < 307d80193b4a4a75b8dc4e0d3162be3755abbed7 | ≥ eb36bedf28be6d986bdbcfa375bab08ffa45efd8, < 7a3e1481f4ee6c581bccc6bfc6c970aac5be7b0c | ≥ eb36bedf28be6d986bdbcfa375bab08ffa45efd8, < 3447641d361dcc5511841d986ad4d849b2900d9b | ≥ eb36bedf28be6d986bdbcfa375bab08ffa45efd8, < b13202d401e1a20fec89b0cda733dcbaf279f79d | ≥ eb36bedf28be6d986bdbcfa375bab08ffa45efd8, < dd633280de7fdfd60dc4fcf63d04e2ad95b43269 | ≥ eb36bedf28be6d986bdbcfa375bab08ffa45efd8, < 452636ea5410a96e02ebaaf80b21e3620b98e0dd | 4.11

3 vendors · 171 products

References

13 links
Show all 13 references