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ReviewHigh

CVE-2026-74550

Linux

In the Linux kernel, the following vulnerability has been resolved: net: do not send ICMP/NDISC Redirects when peer allocation fails When inet_getpeer_v4() or inet_getpeer_v6() fails to allocate a peer entry under memory pressure or tree size caps, redirect handlers previously fell back to sending un-rate-limited ICMP/NDISC Redirect messages. In IPv4, ip_rt_send_redirect() called icmp_send() directly when peer == NULL. In IPv6, ip6_forward() and ndisc_send_redirect() passed a NULL peer into inet_peer_xrlim_allow(), which returned true when peer == NULL. Because ICMP/NDISC Redirects are not...

CVSS
7.5
EPSS
-
- percentile
CISA KEV
Not listed
Published
2026.08.15
PRIORITY ASSESSMENT

Review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.5

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: net: do not send ICMP/NDISC Redirects when peer allocation fails When inet_getpeer_v4() or inet_getpeer_v6() fails to allocate a peer entry under memory pressure or tree size caps, redirect handlers previously fell back to sending un-rate-limited ICMP/NDISC Redirect messages. In IPv4, ip_rt_send_redirect() called icmp_send() directly when peer == NULL. In IPv6, ip6_forward() and ndisc_send_redirect() passed a NULL peer into inet_peer_xrlim_allow(), which returned true when peer == NULL. Because ICMP/NDISC Redirects are not...

Affected product and versions

Product
Linux
Affected versions
>= 92d8682926342d2b6aa5b2ecc02221e00e1573a0 < c0adf8b4247bcc5a145a25c1929006eb392580bb, >= 92d8682926342d2b6aa5b2ecc02221e00e1573a0 < f5ecaa7ea7686fa7ecdb6affc9d3a9a42e4524b1, >= 92d8682926342d2b6aa5b2ecc02221e00e1573a0 < 21666f7af49a90ef44d474916b8ef4402dfd74f5, >= 92d8682926342d2b6aa5b2ecc02221e00e1573a0 < 5ec5f00fc606a6df8434948c4552b3cb1176595d, >= 92d8682926342d2b6aa5b2ecc02221e00e1573a0 < 828f6670d110ff2bf44c743037b38badc315704c, >= 92d8682926342d2b6aa5b2ecc02221e00e1573a0 < dbc3791e3b2472e1ccc08947e0f83b443470ff4f, >= 2.6.39
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
Not available