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CVE-2022-49026

e100: Fix possible use after free in e100_xmit_prepare

HIGH
7.8
CVSS Score
Published: October 21, 2024 at 08:06 PM UTC
Updated: August 5, 2026 at 09:24 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH7.8
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
95%
4.3 ≤ v < 5.10.1584.3 ≤ v < 5.15.824.3 ≤ v < 6.0.124.3 ≤ v < 6.15.11 ≤ v < 5.15.825.16 ≤ v < 6.0.125e5d49422dfb035ca9e280cd61d434095c1512726.1 rc16.1 rc26.1 rc36.1 rc46.1 rc56.1 rc66.1 rc7
Vendor states this is fixed in 45605c75c52c7ae7bfe902214343aabcfe5ba0ff (fixed)
Vendor states this is fixed in 9fc27d22cdb9b1fcd754599d216a8992fed280cd (fixed)
Vendor states this is fixed in b46f6144ab89d3d757ead940759c505091626a7d (fixed)
Vendor states this is fixed in b775f37d943966f6f77dca402f5a9dedce502c25 (fixed)
Vendor states this is fixed in 4.3 (unaffected)
Vendor states this is fixed in 5.10.158 (unaffected)
Vendor states this is fixed in 5.15.82 (unaffected)
Vendor states this is fixed in 6.0.12 (unaffected)
Vendor states this is fixed in 6.1 (unaffected)

References (4)

Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/45605c75c52c7ae7bfe902214343aabcfe5ba0ff
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/9fc27d22cdb9b1fcd754599d216a8992fed280cd
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/b46f6144ab89d3d757ead940759c505091626a7d
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/b775f37d943966f6f77dca402f5a9dedce502c25

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHLinux
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-416

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