CVE-2024-26739: net/sched: act_mirred: don't override retval if we already lost the skb

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

• debian debian linux11.0
• linux linux kernel4.19 and later · before 5.10.238
• linux linux kernel5.11 and later · before 5.15.182
• linux linux kernel5.16 and later · before 6.1.136
• linux linux kernel6.2 and later · before 6.6.19
• linux linux kernel6.7 and later · before 6.7.7
• linux linux kernel6.8

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

• Linux Linux

  • 4.19affected
  • e5cf1baf92cb785b90390db1c624948e70c8b8bd and later · before 0117fe0a4615a7c8d30d6ebcbf87332fbe63e6fdaffected · git
  • e5cf1baf92cb785b90390db1c624948e70c8b8bd and later · before 9d3ef89b6a5e9f2e940de2cef3d543be0be8dec5affected · git
  • e5cf1baf92cb785b90390db1c624948e70c8b8bd and later · before e873e8f7d03a2ee5b77fb1a305c782fed98e2754affected · git
  • e5cf1baf92cb785b90390db1c624948e70c8b8bd and later · before 28cdbbd38a4413b8eff53399b3f872fd4e80db9daffected · git
  • e5cf1baf92cb785b90390db1c624948e70c8b8bd and later · before f4e294bbdca8ac8757db436fc82214f3882fc7e7affected · git
  • e5cf1baf92cb785b90390db1c624948e70c8b8bd and later · before 166c2c8a6a4dc2e4ceba9e10cfe81c3e469e3210affected · git
  • before 4.19not affected · semver
  • 5.10.238 and later · up to and including 5.10.*not affected · semver
  • 5.15.182 and later · up to and including 5.15.*not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Other highest-scoring records for the same primary product.

• CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
  90Now
• CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
  89Now
• CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
  85Now

Published before and after this one in the same product

• ← EarlierCVE-2024-26737Apr 3, 2024 · bpf: Fix racing between bpf_timer_cancel_and_free and bpf_timer_cancel
  31Monitor
• ← EarlierCVE-2024-26738Apr 3, 2024 · powerpc/pseries/iommu: DLPAR add doesn't completely initialize pci_controller
  22Monitor
• Later →CVE-2024-26741Apr 3, 2024 · dccp/tcp: Unhash sk from ehash for tb2 alloc failure after check_estalblished().
  22Monitor

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1free(dev->buf);2/* ... another thread is still running ... */3process(dev->buf);

1lock(&dev->lock);2free(dev->buf);3dev->buf = NULL;4unlock(&dev->lock);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.