CVE-2022-50252 — igb: Do not free q_vector unless new one was allocated
In the Linux kernel, the following vulnerability has been resolved: igb: Do not free q_vector unless new one was allocated Avoid potential use-after-free condition under memory pressure. If the kzalloc() fails, q_vector will be freed but left in the original adapter->q_vector[v_idx] array position.
Who exploits it and how urgent it is
A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.
How the score was calculated
- EPSS 0.2% (30-day exploitation probability)+1
- Technical severity (high)+6
The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).
Triage
Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.
CISA SSVC assessment CISA
Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.
Remediation
Fixes and mitigations documented by the sources — linked to the original advisory.
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
First 24 hours
Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.
- Identify exposed assets running the affected vendor/product/version combinations (Linux Linux, Linux Linux Kernel).
- Apply the fixed version or the patch documented under Remediation.
- Search available logs for exploit probes matching the vulnerability class (memory corruption), errors and authentication anomalies.
Affected scope
Vendor, product and versions as the sources word them.
| Vendor | Product | Versions | Status | Source |
|---|---|---|---|---|
| Linux | Linux |
≥ 72ddef0506da852dc82f078f37ced8ef4d74a2bf and < 3cb18dea11196fb4a06f78294cec5e61985e1affversion 4.3≥ 4.2.2 and < 4.3≥ 4.1.9 and < 4.2≥ 3.18.23 and < 3.19version f4b7f93cd34a6153d454a837708fd4203990d1aeversion a0e26ed623a1e1460c1a191fbc0f37bddab7851aversion 5be042b1917ddf444c20f4e12856535307b37c01 and 8 more≥ 72ddef0506da852dc82f078f37ced8ef4d74a2bf and < 0668716506ca66f90d395f36ccdaebc3e0e84801≥ 72ddef0506da852dc82f078f37ced8ef4d74a2bf and < 56483aecf6b22eb7dff6315b3a174688c6ad494c≥ 72ddef0506da852dc82f078f37ced8ef4d74a2bf and < 6e399577bd397a517df4b938601108c63769ce0a≥ 72ddef0506da852dc82f078f37ced8ef4d74a2bf and < 314f7092b27749bdde44c14095b5533afa2a3bc8≥ 72ddef0506da852dc82f078f37ced8ef4d74a2bf and < f96bd8adc8adde25390965a8c1ee81b73cb62075≥ 72ddef0506da852dc82f078f37ced8ef4d74a2bf and < 68e8adbcaf7a8743e473343b38b9dad66e2ac6f3≥ 72ddef0506da852dc82f078f37ced8ef4d74a2bf and < 0200f0fbb11e359cc35af72ab10b2ec224e6f633≥ 72ddef0506da852dc82f078f37ced8ef4d74a2bf and < 64ca1969599857143e91aeec4440640656100803 |
Vulnerable | CVE Program (cve.org) e CISA ADP |
| Linux | Linux Kernel | < 4.9.337≥ 6.1 and < 6.1.2≥ 5.16 and < 6.0.16≥ 5.11 and < 5.15.86≥ 5.5 and < 5.10.163≥ 4.20 and < 5.4.229≥ 4.15 and < 4.19.270≥ 4.10 and < 4.14.303 | Vulnerable | NIST National Vulnerability Database |
Attack characteristics
The CVSS vector, decoded. It describes the attack, not your exposure to it.
Every base score collected
Sources score independently and may disagree; each row says who scored it and under which version.
| Score | Version | Severity | Expl. | Impact | Scored by |
|---|---|---|---|---|---|
| 7.8 | CVSS 3.1 | High | 1.8 | 5.9 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 via NIST National Vulnerability Database |
| 7.8 | CVSS 3.1 | High | 1.8 | 5.9 | nvd@nist.gov via NIST National Vulnerability Database |
| 7.8 | CVSS 3.1 | High | — | — | GitHub, Inc. via GitHub Security Advisories |
| 7.8 | CVSS 3.1 | High | — | — | Linux via CVE Program (cve.org) e CISA ADP |
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H (score shown at the top: nvd@nist.gov) Weakness MITRE
Weakness class according to MITRE’s CWE catalog.
Detection
Read off the CVSS vector and the weakness class. Starting points, not tested rules.
- Local/physical vector: focus on endpoint telemetry (EDR) from affected hosts.
- Correlate service crashes/restarts with inbound traffic; repeated crashes may indicate attempts.
Timeline
What happened to this CVE, newest first.
- 2026
- Affected products added · linux/linux
- SSVC assessment updated
- Record published
- Fix documented
- Affected products added · linux/linux kernel
- CVSS changed · 7.8
- Source status changed · → Modified
- Record created in this database
- 2025
- CVE published
Source activity
Repeated readings are counted rather than listed.
- 2× References added · Oct 15, 2026 – Oct 15, 2026
- 1× Official description updated · Oct 15, 2026 – Oct 15, 2026
References
11 on the record
- git.kernel.org/stable/c/68e8adbcaf7a8743e473343b38b9dad66e2ac6f3
- git.kernel.org/stable/c/314f7092b27749bdde44c14095b5533afa2a3bc8
- git.kernel.org/stable/c/0200f0fbb11e359cc35af72ab10b2ec224e6f633
- git.kernel.org/stable/c/f96bd8adc8adde25390965a8c1ee81b73cb62075
- git.kernel.org/stable/c/3cb18dea11196fb4a06f78294cec5e61985e1aff
- git.kernel.org/stable/c/64ca1969599857143e91aeec4440640656100803
- git.kernel.org/stable/c/6e399577bd397a517df4b938601108c63769ce0a
- git.kernel.org/stable/c/56483aecf6b22eb7dff6315b3a174688c6ad494c
- git.kernel.org/stable/c/0668716506ca66f90d395f36ccdaebc3e0e84801
- github.com/advisories/GHSA-cp87-76w4-mfxp
- nvd.nist.gov/vuln/detail/CVE-2022-50252
Elsewhere on this site
Related CVEs (same products)
- Critical CVE-2026-99999 ipv4: validate checksum_start before completing checksum 15h
- Unknown CVE-2026-98432 ipv4: free inet_opt and ireq_opt after an RCU grace period 15h
- Unknown CVE-2026-98431 RDMA/uverbs: Fix mmap_lock/disassociation_lock circular dependency 1d
- Unknown CVE-2026-98430 RDMA/efa: Keep admin queues alive while IRQ is registered 1d
- Unknown CVE-2026-98429 RDMA/efa: Keep EQ resources alive while IRQ is registered 1d
- Unknown CVE-2026-98428 ALSA: usb: 6fire: Avoid embedded URBs 1d
Not in any source we poll
Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.
- No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
- No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
- No exploit packet captures, log samples, or incident case IDs supplied.
Answered from this record
Text assembled only from the fields above — no additional claims.
What should defenders know first?
CVE-2022-50252 is "igb: Do not free q_vector unless new one was allocated", rated High. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 7.8 describes technical severity. EPSS 0.17% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.
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