7.8

CVE-2022-49026: e100: Fix possible use after free in e100_xmit_prepare

Modified
AliasesUBUNTU-CVE-2022-49026DEBIAN-CVE-2022-49026
Published 21-10-2024Last modified 05-08-2026

Vulnerability summary

CVE-2022-49026 is a high (CVSS 7.8) Use After Free vulnerability in linux. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 15.1% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.24%
0%100%
Low · 0.00 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 23 · Related 22
LSN-0117-1SUSE-SU-2024:3983-1SUSE-SU-2024:3985-1SUSE-SU-2024:4082-1SUSE-SU-2024:4100-1SUSE-SU-2024:4131-1

Timeline

  1. 21-10-2024
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: e100: Fix possible use after free in e100_xmit_prepare In e100_xmit_prepare(), if we can't map the skb, then return -ENOMEM, so e100_xmit_frame() will return NETDEV_TX_BUSY and the upper layer will resend the skb. But the skb is already freed, which will cause UAF bug when the upper layer resends the skb. Remove the harmful free.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

15%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.24% on 04-10-2026

04-10-202603-11-2026

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

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu113 products
  • linux< 4.4.0-276.310 | < 4.15.0-245.257 | < 5.4.0-224.244 | < 5.15.0-67.74
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 4.4.0-1150.156 | < 4.4.0-1188.203 | < 4.15.0-1187.200 | < 5.4.0-1153.163 | < 5.15.0-1031.35
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 5e5d49422dfb035ca9e280cd61d434095c151272, < b775f37d943966f6f77dca402f5a9dedce502c25 | ≥ 5e5d49422dfb035ca9e280cd61d434095c151272, < 9fc27d22cdb9b1fcd754599d216a8992fed280cd | ≥ 5e5d49422dfb035ca9e280cd61d434095c151272, < b46f6144ab89d3d757ead940759c505091626a7d | ≥ 5e5d49422dfb035ca9e280cd61d434095c151272, < 45605c75c52c7ae7bfe902214343aabcfe5ba0ff | 4.3
  • linux_kernel≥ 4.3, < 5.10.158 | ≥ 5.11, < 5.15.82 | ≥ 5.16, < 6.0.12 | 6.1:rc1 | 6.1:rc2 | 6.1:rc3 | 6.1:rc4 | 6.1:rc5 | 6.1:rc6 | 6.1:rc7
Debian1 product
  • linux< 6.0.12-1

3 vendors · 116 products

References

23 links
Show all 23 references