9.8

CVE-2026-74495: igbvf: Fix leak in TX DMA error cleanup

Received
AliasesUBUNTU-CVE-2026-74495DEBIAN-CVE-2026-74495
Published 15-08-2026Last modified 16-10-2026

Vulnerability summary

CVE-2026-74495 is a critical (CVSS 9.8) vulnerability in linux. EPSS estimates a 0.51% chance of exploitation in the next 30 days, higher than 43.9% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 9.8 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 05-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.51%
0%100%
Low · -0.24 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 22 · Related 21
OPENSUSE-SU-2026:21910-1SUSE-SU-2026:23477-1SUSE-SU-2026:23481-1SUSE-SU-2026:23528-1SUSE-SU-2026:23529-1SUSE-SU-2026:23881-1

Timeline

  1. 15-08-2026
    PublishedVulnerability first disclosed.
  2. 16-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: igbvf: Fix leak in TX DMA error cleanup If an error is encountered while mapping TX buffers, the driver should unmap any buffers already mapped for that skb. Because count is incremented before each frag mapping, it will always match the correct number of unmappings needed when dma_error is reached. Decrementing count before the while loop in dma_error causes an off-by-one error. If any mapping was successful before an unsuccessful mapping, exactly one DMA mapping (the head) would leak. This bug was introduced by a 2010 fix for an endless loop in dma_error. All other affected drivers have already been fixed.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.51%

Chance of exploitation in the next 30 days

Percentile

44%

Versus all other CVEs

30-day change

Decrease -0.24 pp

From 0.76% on 06-10-2026

06-10-202605-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu169 products
  • linuxAll versions (No fix recorded) | < 5.15.0-198.208 | < 7.0.0-42.42
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1117.124 | < 7.0.0-1016.17
  • 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 | < 7.1.8-1
  • linux-6.12< 6.12.107-1~deb12u1
Linux1 product
  • linux≥ c1fa347f20f17f14a4a1575727fa24340e8a9117, < e42b7225c45f57b42306b80cdd3bda202bae7293 | ≥ c1fa347f20f17f14a4a1575727fa24340e8a9117, < e3ed89c257f6361f13df23023cd10ace830330ad | ≥ c1fa347f20f17f14a4a1575727fa24340e8a9117, < 56726ff12cb6759ab90d6f5332c2377aeca7d249 | ≥ c1fa347f20f17f14a4a1575727fa24340e8a9117, < 31089f4eab42e0fc248ec80c26f9b0bad59ba4cc | ≥ c1fa347f20f17f14a4a1575727fa24340e8a9117, < bc25d56c03e41c10bc4b40e99ca5d7b941675c04 | ≥ c1fa347f20f17f14a4a1575727fa24340e8a9117, < 845a9cdd9b03b7b6fa8de3ee80579780350a7f65 | ≥ c1fa347f20f17f14a4a1575727fa24340e8a9117, < df07003b5a6c6c9fce60d765d6a3da815a74c41c | ≥ c1fa347f20f17f14a4a1575727fa24340e8a9117, < 0565052b7e2f436b7f1541f4849da96dc0aa7a0e | 2.6.33

3 vendors · 172 products

References

22 links
Show all 22 references