CVE-2026-74550
Detail
Received This CVE record has recently been published to the CVE List and has been included within the NVD dataset.
Description
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 part of the default global rate limit
mask (sysctl_icmp_ratemask), sending redirects when peer == NULL creates
an un-rate-limited ICMP packet storm.
Fix this by failing closed in ip_rt_send_redirect(), ip6_forward(), and
ndisc_send_redirect() when peer is NULL.
Metrics
CVSS Version 4.0
CVSS Version 3.x
CVSS Version 2.0
NVD enrichment efforts reference publicly available information to associate
vector strings. CVSS information contributed by other sources is also
displayed.
CVSS 4.0 Severity and Vector Strings:
NVD assessment
not yet provided.
CVSS 3.x Severity and Vector Strings:
NVD assessment
not yet provided.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0 Severity and Vector Strings:
NVD assessment
not yet provided.
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Change History
3 change records found show changes
CVE Modified by kernel.org
8/19/2026 1:21:10 PM
Action
Type
Old Value
New Value
Added
Reference
https://git.kernel.org/stable/c/c0adf8b4247bcc5a145a25c1929006eb392580bb
Changed
Affected
[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["net/ipv4/route.c","net/ipv6/ip6_output.c","net/ipv6/ndisc.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"92d8682926342d2b6aa5b2ecc02221e00e1573a0","lessThan":"f5ecaa7ea7686fa7ecdb6affc9d3a9a42e4524b1","versionType":"git","status":"affected"},{"version":"92d8682926342d2b6aa5b2ecc02221e00e1573a0","lessThan":"21666f7af49a90ef44d474916b8ef4402dfd74f5","versionType":"git","status":"affected"},{"version":"92d8682926342d2b6aa5b2ecc02221e00e1573a0","lessThan":"5ec5f00fc606a6df8434948c4552b3cb1176595d","versionType":"git","status":"affected"},{"version":"92d8682926342d2b6aa5b2ecc02221e00e1573a0","lessThan":"828f6670d110ff2bf44c743037b38badc315704c","versionType":"git","status":"affected"},{"version":"92d8682926342d2b6aa5b2ecc02221e00e1573a0","lessThan":"dbc3791e3b2472e1ccc08947e0f83b443470ff4f","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["net/ipv4/route.c","net/ipv6/ip6_output.c","net/ipv6/ndisc.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"2.6.39","status":"affected"},{"version":"0","lessThan":"2.6.39","versionType":"semver","status":"unaffected"},{"version":"6.6.151","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.103","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.44","lessThanOrEqual":"6.18.*","versionType":"semver","status":"unaffected"},{"version":"7.1.8","lessThanOrEqual":"7.1.*","versionType":"semver","status":"unaffected"},{"version":"7.2","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]
[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["net/ipv4/route.c","net/ipv6/ip6_output.c","net/ipv6/ndisc.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"92d8682926342d2b6aa5b2ecc02221e00e1573a0","lessThan":"c0adf8b4247bcc5a145a25c1929006eb392580bb","versionType":"git","status":"affected"},{"version":"92d8682926342d2b6aa5b2ecc02221e00e1573a0","lessThan":"f5ecaa7ea7686fa7ecdb6affc9d3a9a42e4524b1","versionType":"git","status":"affected"},{"version":"92d8682926342d2b6aa5b2ecc02221e00e1573a0","lessThan":"21666f7af49a90ef44d474916b8ef4402dfd74f5","versionType":"git","status":"affected"},{"version":"92d8682926342d2b6aa5b2ecc02221e00e1573a0","lessThan":"5ec5f00fc606a6df8434948c4552b3cb1176595d","versionType":"git","status":"affected"},{"version":"92d8682926342d2b6aa5b2ecc02221e00e1573a0","lessThan":"828f6670d110ff2bf44c743037b38badc315704c","versionType":"git","status":"affected"},{"version":"92d8682926342d2b6aa5b2ecc02221e00e1573a0","lessThan":"dbc3791e3b2472e1ccc08947e0f83b443470ff4f","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["net/ipv4/route.c","net/ipv6/ip6_output.c","net/ipv6/ndisc.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"2.6.39","status":"affected"},{"version":"0","lessThan":"2.6.39","versionType":"semver","status":"unaffected"},{"version":"6.1.183","lessThanOrEqual":"6.1.*","versionType":"semver","status":"unaffected"},{"version":"6.6.151","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.103","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.44","lessThanOrEqual":"6.18.*","versionType":"semver","status":"unaffected"},{"version":"7.1.8","lessThanOrEqual":"7.1.*","versionType":"semver","status":"unaffected"},{"version":"7.2","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]
CVE Modified by kernel.org
8/17/2026 2:19:52 AM
Action
Type
Old Value
New Value
Added
CVSS V3.1
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Changed
Affected
[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["net/ipv4/route.c","net/ipv6/ip6_output.c","net/ipv6/ndisc.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"92d8682926342d2b6aa5b2ecc02221e00e1573a0","lessThan":"f5ecaa7ea7686fa7ecdb6affc9d3a9a42e4524b1","versionType":"git","status":"affected"},{"version":"92d8682926342d2b6aa5b2ecc02221e00e1573a0","lessThan":"21666f7af49a90ef44d474916b8ef4402dfd74f5","versionType":"git","status":"affected"},{"version":"92d8682926342d2b6aa5b2ecc02221e00e1573a0","lessThan":"5ec5f00fc606a6df8434948c4552b3cb1176595d","versionType":"git","status":"affected"},{"version":"92d8682926342d2b6aa5b2ecc02221e00e1573a0","lessThan":"828f6670d110ff2bf44c743037b38badc315704c","versionType":"git","status":"affected"},{"version":"92d8682926342d2b6aa5b2ecc02221e00e1573a0","lessThan":"dbc3791e3b2472e1ccc08947e0f83b443470ff4f","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["net/ipv4/route.c","net/ipv6/ip6_output.c","net/ipv6/ndisc.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"2.6.39","status":"affected"},{"version":"0","lessThan":"2.6.39","versionType":"semver","status":"unaffected"},{"version":"6.6.151","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.103","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.44","lessThanOrEqual":"6.18.*","versionType":"semver","status":"unaffected"},{"version":"7.1.8","lessThanOrEqual":"7.1.*","versionType":"semver","status":"unaffected"},{"version":"7.2-rc6","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]
[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["net/ipv4/route.c","net/ipv6/ip6_output.c","net/ipv6/ndisc.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"92d8682926342d2b6aa5b2ecc02221e00e1573a0","lessThan":"f5ecaa7ea7686fa7ecdb6affc9d3a9a42e4524b1","versionType":"git","status":"affected"},{"version":"92d8682926342d2b6aa5b2ecc02221e00e1573a0","lessThan":"21666f7af49a90ef44d474916b8ef4402dfd74f5","versionType":"git","status":"affected"},{"version":"92d8682926342d2b6aa5b2ecc02221e00e1573a0","lessThan":"5ec5f00fc606a6df8434948c4552b3cb1176595d","versionType":"git","status":"affected"},{"version":"92d8682926342d2b6aa5b2ecc02221e00e1573a0","lessThan":"828f6670d110ff2bf44c743037b38badc315704c","versionType":"git","status":"affected"},{"version":"92d8682926342d2b6aa5b2ecc02221e00e1573a0","lessThan":"dbc3791e3b2472e1ccc08947e0f83b443470ff4f","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["net/ipv4/route.c","net/ipv6/ip6_output.c","net/ipv6/ndisc.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"2.6.39","status":"affected"},{"version":"0","lessThan":"2.6.39","versionType":"semver","status":"unaffected"},{"version":"6.6.151","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.103","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.44","lessThanOrEqual":"6.18.*","versionType":"semver","status":"unaffected"},{"version":"7.1.8","lessThanOrEqual":"7.1.*","versionType":"semver","status":"unaffected"},{"version":"7.2","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]
New CVE Received from kernel.org
8/15/2026 9:18:00 AM
Action
Type
Old Value
New Value
Added
Description
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 part of the default global rate limit
mask (sysctl_icmp_ratemask), sending redirects when peer == NULL creates
an un-rate-limited ICMP packet storm.
Fix this by failing closed in ip_rt_send_redirect(), ip6_forward(), and
ndisc_send_redirect() when peer is NULL.
Added
Reference
https://git.kernel.org/stable/c/21666f7af49a90ef44d474916b8ef4402dfd74f5
Added
Reference
https://git.kernel.org/stable/c/5ec5f00fc606a6df8434948c4552b3cb1176595d
Added
Reference
https://git.kernel.org/stable/c/828f6670d110ff2bf44c743037b38badc315704c
Added
Reference
https://git.kernel.org/stable/c/dbc3791e3b2472e1ccc08947e0f83b443470ff4f
Added
Reference
https://git.kernel.org/stable/c/f5ecaa7ea7686fa7ecdb6affc9d3a9a42e4524b1
Added
Affected
[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["net/ipv4/route.c","net/ipv6/ip6_output.c","net/ipv6/ndisc.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"92d8682926342d2b6aa5b2ecc02221e00e1573a0","lessThan":"f5ecaa7ea7686fa7ecdb6affc9d3a9a42e4524b1","versionType":"git","status":"affected"},{"version":"92d8682926342d2b6aa5b2ecc02221e00e1573a0","lessThan":"21666f7af49a90ef44d474916b8ef4402dfd74f5","versionType":"git","status":"affected"},{"version":"92d8682926342d2b6aa5b2ecc02221e00e1573a0","lessThan":"5ec5f00fc606a6df8434948c4552b3cb1176595d","versionType":"git","status":"affected"},{"version":"92d8682926342d2b6aa5b2ecc02221e00e1573a0","lessThan":"828f6670d110ff2bf44c743037b38badc315704c","versionType":"git","status":"affected"},{"version":"92d8682926342d2b6aa5b2ecc02221e00e1573a0","lessThan":"dbc3791e3b2472e1ccc08947e0f83b443470ff4f","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["net/ipv4/route.c","net/ipv6/ip6_output.c","net/ipv6/ndisc.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"2.6.39","status":"affected"},{"version":"0","lessThan":"2.6.39","versionType":"semver","status":"unaffected"},{"version":"6.6.151","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.103","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.44","lessThanOrEqual":"6.18.*","versionType":"semver","status":"unaffected"},{"version":"7.1.8","lessThanOrEqual":"7.1.*","versionType":"semver","status":"unaffected"},{"version":"7.2-rc6","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]
Quick Info
CVE Dictionary Entry: CVE-2026-74550 NVD
Published Date: 08/15/2026 NVD
Last Modified: 08/19/2026
Source: kernel.org
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