CVE Details

CVE-2026-53362 Linux Kernel Unspecified Vulnerability
Published: 2026-08-27 CVSS: 7.8 HIGH Product: Linux Kernel Due Date: 2026-08-30

Linux Kernel contains an unspecified vulnerability that can allow for privilege escalation via IPv6 networking subsystem. This vulnerability can impact multiple products, including but not limited to Suse, Red Hat, and other products using Linux.

GitHub PoC

Warning: GitHub PoC repositories are unverified. Some may be fake or contain malware. Use caution and review code before running anything.
  • ekomsSavior/chimera-lpe-chain • ⭐ 4 • 2026-07-21 • Conf: 95.0%
  • proof-of-concept exploits targeting July 2026 Linux kernel vulnerabilities

FIRST EPSS

EPSS estimates the probability of exploitation in the next 30 days. Higher values indicate higher likelihood of real-world exploitation.

Timeline

CVE Stalker KEV MITRE GitHub FIRST (EPSS)

MITRE

CVSS

  • Score: 7.8
  • Severity: HIGH
  • Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

SSVC

  • Exploitation: active
  • Automatable: no
  • Technical Impact: total

References

Show Raw Data
Key Remaining Key Value
dataType CVE_RECORD
dataVersion 5.2
cveMetadata > cveId CVE-2026-53362
cveMetadata > assignerOrgId 416baaa9-dc9f-4396-8d5f-8c081fb06d67
cveMetadata > state PUBLISHED
cveMetadata > assignerShortName Linux
cveMetadata > dateReserved 2026-06-09T07:44:35.400Z
cveMetadata > datePublished 2026-07-04T11:56:35.864Z
cveMetadata > dateUpdated 2026-08-27T17:45:37.543Z
containers > cna > providerMetadata > orgId 416baaa9-dc9f-4396-8d5f-8c081fb06d67
containers > cna > providerMetadata > shortName Linux
containers > cna > providerMetadata > dateUpdated 2026-08-17T04:50:29.351Z
containers > cna > descriptions > 0 > lang en
containers > cna > descriptions > 0 > value In the Linux kernel, the following vulnerability has been resolved: ipv6: account for fraggap on the paged allocation path In __ip6_append_data(), when the paged-allocation branch is taken (MSG_MORE / NETIF_F_SG / large fraglen), alloclen and pagedlen are computed as alloclen = fragheaderlen + transhdrlen; pagedlen = datalen - transhdrlen; datalen already includes fraggap (datalen = length + fraggap). When fraggap is non-zero, this is not the first skb and transhdrlen is zero. The fraggap bytes carried over from the previous skb are copied just past the fragment headers in the new skb's linear area. The linear area is therefore undersized by fraggap bytes while pagedlen is overstated by the same amount, and the copy writes past skb->end into the trailing skb_shared_info. An unprivileged user can trigger this via a UDPv6 socket using MSG_MORE together with MSG_SPLICE_PAGES. The bad accounting was introduced by commit 773ba4fe9104 ("ipv6: avoid partial copy for zc"). Before commit ce650a166335 ("udp6: Fix __ip6_append_data()'s handling of MSG_SPLICE_PAGES"), the negative copy value caused -EINVAL to be returned. That later commit allowed MSG_SPLICE_PAGES to proceed in this case, making the corruption triggerable. The non-paged branch sets alloclen to fraglen, which already accounts for fraggap because datalen does. Bring the paged branch in line by adding fraggap to alloclen and subtracting it from pagedlen. After this adjustment, copy no longer collapses to -fraggap on the paged path, so remove the stale comment describing that old arithmetic. Since a negative copy is no longer expected for a valid MSG_SPLICE_PAGES case, remove the MSG_SPLICE_PAGES exception from the negative copy check.
containers > cna > metrics > 0 > cvssV3_1 > version 3.1
containers > cna > metrics > 0 > cvssV3_1 > vectorString CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
containers > cna > metrics > 0 > cvssV3_1 > baseScore 7.8
containers > cna > metrics > 0 > cvssV3_1 > baseSeverity HIGH
containers > cna > metrics > 0 > scenarios > 0 > lang en
containers > cna > metrics > 0 > scenarios > 0 > value AV:L - The vulnerable path is IPv6 transmit skb construction reached by a local process using splice/send operations on an AF_INET6 UDP socket. Received network packets do not enter this path, and a remote peer cannot directly set MSG_SPLICE_PAGES. AC:L - No race is required; the attacker controls the UDPv6 socket, MSG_MORE/splice sequence, and send sizes needed to create a nonzero fraggap on the paged allocation path. NETIF_F_SG is common on plausible IPv6 interfaces, so the trigger conditions are not unusually restrictive. PR:L - Creating a SOCK_DGRAM IPv6 UDP socket and using splice into it requires only an unprivileged local user. The CAP_NET_RAW check in inet6_create applies to SOCK_RAW, not this UDP datagram path. UI:N - The attacker directly invokes the local syscalls and socket operations needed to trigger the bug. No victim user action is required. S:U - The corruption occurs within the kernel networking stack and impacts the same kernel security authority. It is not a VM escape, IOMMU/DMA bypass, or cross-scope boundary violation. C:H - The bug is an out-of-bounds write into skb_shared_info, which contains fragment metadata and pointers used later by networking code. Such attacker-controlled kernel memory corruption can plausibly be leveraged for information disclosure, so confidentiality is High. I:H - The fraggap bytes come from attacker-controlled skb data and are copied past skb->end into skb_shared_info. This is an out-of-bounds write to kernel metadata and is scored as High integrity impact. A:H - Corrupting skb_shared_info can readily crash or panic the kernel during skb handling, checksum, transmit, or cleanup. The vulnerability is therefore a High availability impact.
containers > cna > affected > 0 > product Linux
containers > cna > affected > 0 > vendor Linux
containers > cna > affected > 0 > defaultStatus unaffected
containers > cna > affected > 0 > repo https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
containers > cna > affected > 0 > programFiles > 0 net/ipv6/ip6_output.c
containers > cna > affected > 0 > versions > 0 > version 773ba4fe9104a64a54d1c00f0fb6ffb95def2b03
containers > cna > affected > 0 > versions > 0 > lessThan 14200d435af9a9eeb444f529fc2f689a236b7962
containers > cna > affected > 0 > versions > 0 > status affected
containers > cna > affected > 0 > versions > 0 > versionType git
containers > cna > affected > 0 > versions > 1 > version 773ba4fe9104a64a54d1c00f0fb6ffb95def2b03
containers > cna > affected > 0 > versions > 1 > lessThan 65fb14cbebb0cd0eff903a22d33537ddc8b95769
containers > cna > affected > 0 > versions > 1 > status affected
containers > cna > affected > 0 > versions > 1 > versionType git
containers > cna > affected > 0 > versions > 2 > version 773ba4fe9104a64a54d1c00f0fb6ffb95def2b03
containers > cna > affected > 0 > versions > 2 > lessThan 46f201f8b4c39633a1fa3dc12459f506d470993d
containers > cna > affected > 0 > versions > 2 > status affected
containers > cna > affected > 0 > versions > 2 > versionType git
containers > cna > affected > 0 > versions > 3 > version 773ba4fe9104a64a54d1c00f0fb6ffb95def2b03
containers > cna > affected > 0 > versions > 3 > lessThan 6374fb9edf72c67a118a2c214a0dddd04c921e0a
containers > cna > affected > 0 > versions > 3 > status affected
containers > cna > affected > 0 > versions > 3 > versionType git
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containers > cna > affected > 0 > versions > 4 > status affected
containers > cna > affected > 0 > versions > 4 > versionType git
containers > cna > affected > 0 > versions > 5 > version 773ba4fe9104a64a54d1c00f0fb6ffb95def2b03
containers > cna > affected > 0 > versions > 5 > lessThan 736b380e28d0480c7bc3e022f1950f31fe53a7c5
containers > cna > affected > 0 > versions > 5 > status affected
containers > cna > affected > 0 > versions > 5 > versionType git
containers > cna > affected > 1 > product Linux
containers > cna > affected > 1 > vendor Linux
containers > cna > affected > 1 > defaultStatus affected
containers > cna > affected > 1 > repo https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
containers > cna > affected > 1 > programFiles > 0 net/ipv6/ip6_output.c
containers > cna > affected > 1 > versions > 0 > version 6.0
containers > cna > affected > 1 > versions > 0 > status affected
containers > cna > affected > 1 > versions > 1 > version 0
containers > cna > affected > 1 > versions > 1 > lessThan 6.0
containers > cna > affected > 1 > versions > 1 > status unaffected
containers > cna > affected > 1 > versions > 1 > versionType semver
containers > cna > affected > 1 > versions > 2 > version 6.1.177
containers > cna > affected > 1 > versions > 2 > lessThanOrEqual 6.1.*
containers > cna > affected > 1 > versions > 2 > status unaffected
containers > cna > affected > 1 > versions > 2 > versionType semver
containers > cna > affected > 1 > versions > 3 > version 6.6.144
containers > cna > affected > 1 > versions > 3 > lessThanOrEqual 6.6.*
containers > cna > affected > 1 > versions > 3 > status unaffected
containers > cna > affected > 1 > versions > 3 > versionType semver
containers > cna > affected > 1 > versions > 4 > version 6.12.95
containers > cna > affected > 1 > versions > 4 > lessThanOrEqual 6.12.*
containers > cna > affected > 1 > versions > 4 > status unaffected
containers > cna > affected > 1 > versions > 4 > versionType semver
containers > cna > affected > 1 > versions > 5 > version 6.18.38
containers > cna > affected > 1 > versions > 5 > lessThanOrEqual 6.18.*
containers > cna > affected > 1 > versions > 5 > status unaffected
containers > cna > affected > 1 > versions > 5 > versionType semver
containers > cna > affected > 1 > versions > 6 > version 7.1.3
containers > cna > affected > 1 > versions > 6 > lessThanOrEqual 7.1.*
containers > cna > affected > 1 > versions > 6 > status unaffected
containers > cna > affected > 1 > versions > 6 > versionType semver
containers > cna > affected > 1 > versions > 7 > version 7.2
containers > cna > affected > 1 > versions > 7 > lessThanOrEqual *
containers > cna > affected > 1 > versions > 7 > status unaffected
containers > cna > affected > 1 > versions > 7 > versionType original_commit_for_fix
containers > cna > cpeApplicability > 0 > nodes > 0 > operator OR
containers > cna > cpeApplicability > 0 > nodes > 0 > negate False
containers > cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 0 > vulnerable True
containers > cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 0 > criteria cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
containers > cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 0 > versionStartIncluding 6.0
containers > cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 0 > versionEndExcluding 6.1.177
containers > cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 1 > vulnerable True
containers > cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 1 > criteria cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
containers > cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 1 > versionStartIncluding 6.0
containers > cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 1 > versionEndExcluding 6.6.144
containers > cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 2 > vulnerable True
containers > cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 2 > criteria cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
containers > cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 2 > versionStartIncluding 6.0
containers > cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 2 > versionEndExcluding 6.12.95
containers > cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 3 > vulnerable True
containers > cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 3 > criteria cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
containers > cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 3 > versionStartIncluding 6.0
containers > cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 3 > versionEndExcluding 6.18.38
containers > cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 4 > vulnerable True
containers > cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 4 > criteria cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
containers > cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 4 > versionStartIncluding 6.0
containers > cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 4 > versionEndExcluding 7.1.3
containers > cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 5 > vulnerable True
containers > cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 5 > criteria cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
containers > cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 5 > versionStartIncluding 6.0
containers > cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 5 > versionEndExcluding 7.2
containers > cna > references > 0 > url https://git.kernel.org/stable/c/14200d435af9a9eeb444f529fc2f689a236b7962
containers > cna > references > 1 > url https://git.kernel.org/stable/c/65fb14cbebb0cd0eff903a22d33537ddc8b95769
containers > cna > references > 2 > url https://git.kernel.org/stable/c/46f201f8b4c39633a1fa3dc12459f506d470993d
containers > cna > references > 3 > url https://git.kernel.org/stable/c/6374fb9edf72c67a118a2c214a0dddd04c921e0a
containers > cna > references > 4 > url https://git.kernel.org/stable/c/e9eacf19281ea2498b36291b56c9606118c2d74e
containers > cna > references > 5 > url https://git.kernel.org/stable/c/736b380e28d0480c7bc3e022f1950f31fe53a7c5
containers > cna > title ipv6: account for fraggap on the paged allocation path
containers > cna > x_generator > engine bippy-1.2.0
containers > adp > 0 > metrics > 0 > other > type ssvc
containers > adp > 0 > metrics > 0 > other > content > id CVE-2026-53362
containers > adp > 0 > metrics > 0 > other > content > role CISA Coordinator
containers > adp > 0 > metrics > 0 > other > content > options > 0 > Exploitation active
containers > adp > 0 > metrics > 0 > other > content > options > 1 > Automatable no
containers > adp > 0 > metrics > 0 > other > content > options > 2 > Technical Impact total
containers > adp > 0 > metrics > 0 > other > content > version 2.0.3
containers > adp > 0 > metrics > 0 > other > content > timestamp 2026-08-27T17:44:15.534644Z
containers > adp > 0 > references > 0 > url https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-53362
containers > adp > 0 > references > 0 > tags > 0 government-resource
containers > adp > 0 > problemTypes > 0 > descriptions > 0 > lang en
containers > adp > 0 > problemTypes > 0 > descriptions > 0 > type CWE
containers > adp > 0 > problemTypes > 0 > descriptions > 0 > cweId CWE-122
containers > adp > 0 > problemTypes > 0 > descriptions > 0 > description CWE-122 Heap-based Buffer Overflow
containers > adp > 0 > title CISA ADP Vulnrichment
containers > adp > 0 > providerMetadata > orgId 134c704f-9b21-4f2e-91b3-4a467353bcc0
containers > adp > 0 > providerMetadata > shortName CISA-ADP
containers > adp > 0 > providerMetadata > dateUpdated 2026-08-27T17:45:37.543Z