ipvs: clear IPv4 options after rebasing tunnel ICMP errors

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-74669
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-22 16:16:40 UTC
Updated2026-08-25 06:18:49 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: ipvs: clear IPv4 options after rebasing tunnel ICMP errors ip_vs_in_icmp() rebases an skb from the outer ICMP packet to the quoted original request before passing it to icmp_send(). However, IPCB(skb)->opt still describes the outer IPv4 header. A timestamp option in the outer header can therefore leave an offset that points into the quoted transport header after the rebase. __ip_options_echo() treats a byte at that stale location as the option length and copies it into the fixed-size option storage on the __icmp_send() stack, causing a stack out-of-bounds write. Clear the stale option metadata after resetting the network header. Keep the remaining control block fields, including the ingress interface used by the ICMP response path.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.005140000 probability, percentile 0.414760000 (date 2026-08-25)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e 79ffa99202c944467e28b13b513bf2998732edff git Not specified
CNA Linux Linux affected f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e c9413b50204738fbc429bb86bf01353c393a6c28 git Not specified
CNA Linux Linux affected f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e 37c61b3745129cbd682c557b51345828120972e5 git Not specified
CNA Linux Linux affected f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e ed246dd85ebf27c1f6b7897834d40786c0ca3006 git Not specified
CNA Linux Linux affected f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e 6f46fc460e9316062bdcdf89199eb5d7a33da33b git Not specified
CNA Linux Linux affected f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e 75eec935444db4af2123e0491936f6e273d7ea00 git Not specified
CNA Linux Linux affected f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e 384b4dae14277d369221d187e9b3af56c79d2e50 git Not specified
CNA Linux Linux affected f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e e0ba936287dfe9783426aac27e5fd76fe35b38c9 git Not specified
CNA Linux Linux affected 3.7 Not specified
CNA Linux Linux unaffected 3.7 semver Not specified
CNA Linux Linux unaffected 5.10.265 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.216 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.183 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.152 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.104 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.45 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.9 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/37c61b3745129cbd682c557b51345828120972e5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c9413b50204738fbc429bb86bf01353c393a6c28 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e0ba936287dfe9783426aac27e5fd76fe35b38c9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/79ffa99202c944467e28b13b513bf2998732edff 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6f46fc460e9316062bdcdf89199eb5d7a33da33b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/384b4dae14277d369221d187e9b3af56c79d2e50 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/75eec935444db4af2123e0491936f6e273d7ea00 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ed246dd85ebf27c1f6b7897834d40786c0ca3006 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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