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CVE-2026-62356

Updated redis packages fix a security vulnerability

7.5 HighPublic exploitFix available

The updated package fixes security vulnerabilities, including: Miscalculated buffer size in CMSketch RDB loading may lead to heap OOB write. (CVE-2026-62356)

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
High
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

What each source reports

OSV Score usedOESA-2026-4400 7.5

redis security update

Redis is an advanced key-value store. It is often referred to as a dattructure server since keys can contain strings, hashes ,lists, sets anorted sets.

Security Fix(es):

In the Linux kernel, the following vulnerability has been resolved: cifs: Fix missing credit release on failure in cifs_issue_read() Fix missing release of credits in the failure path in cifs_issue_read() lest retrying the subreq just overwrites the credits value.(CVE-2026-62356)

Redis contains a use-after-free vulnerability in the 'tlsProcessPendingData()' function, which handles the TLS pending-data list if Redis is configured with TLS support. A remote, unauthenticated attacker may be able to execute arbitrary commands with the privileges of the Redis server. Fixed in Redis 8.2.9, 8.4.6, 8.6.6, 8.8.2, and 8.10.1.(CVE-2026-81934)

A vulnerability, which was classified as critical, was found in Redis up to 8.8.1/8.9.x.CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer.This is going to have an impact on confidentiality, integrity, and availability.Upgrading to version 8.10.0 eliminates this vulnerability.(CVE-2026-92925)

Record
OESA-2026-4400
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSV Score usedOESA-2026-4401 7.5

redis security update

Redis is an advanced key-value store. It is often referred to as a dattructure server since keys can contain strings, hashes ,lists, sets anorted sets.

Security Fix(es):

In the Linux kernel, the following vulnerability has been resolved: cifs: Fix missing credit release on failure in cifs_issue_read() Fix missing release of credits in the failure path in cifs_issue_read() lest retrying the subreq just overwrites the credits value.(CVE-2026-62356)

Redis contains a use-after-free vulnerability in the 'tlsProcessPendingData()' function, which handles the TLS pending-data list if Redis is configured with TLS support. A remote, unauthenticated attacker may be able to execute arbitrary commands with the privileges of the Redis server. Fixed in Redis 8.2.9, 8.4.6, 8.6.6, 8.8.2, and 8.10.1.(CVE-2026-81934)

A vulnerability, which was classified as critical, was found in Redis up to 8.8.1/8.9.x.CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer.This is going to have an impact on confidentiality, integrity, and availability.Upgrading to version 8.10.0 eliminates this vulnerability.(CVE-2026-92925)

Record
OESA-2026-4401
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSV Score usedOESA-2026-4402 7.5

redis security update

Redis is an advanced key-value store. It is often referred to as a dattructure server since keys can contain strings, hashes ,lists, sets anorted sets.

Security Fix(es):

In the Linux kernel, the following vulnerability has been resolved: cifs: Fix missing credit release on failure in cifs_issue_read() Fix missing release of credits in the failure path in cifs_issue_read() lest retrying the subreq just overwrites the credits value.(CVE-2026-62356)

Redis contains a use-after-free vulnerability in the 'tlsProcessPendingData()' function, which handles the TLS pending-data list if Redis is configured with TLS support. A remote, unauthenticated attacker may be able to execute arbitrary commands with the privileges of the Redis server. Fixed in Redis 8.2.9, 8.4.6, 8.6.6, 8.8.2, and 8.10.1.(CVE-2026-81934)

A vulnerability, which was classified as critical, was found in Redis up to 8.8.1/8.9.x.CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer.This is going to have an impact on confidentiality, integrity, and availability.Upgrading to version 8.10.0 eliminates this vulnerability.(CVE-2026-92925)

Record
OESA-2026-4402
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSV Score usedOESA-2026-4403 7.5

redis security update

Redis is an advanced key-value store. It is often referred to as a dattructure server since keys can contain strings, hashes ,lists, sets anorted sets.

Security Fix(es):

In the Linux kernel, the following vulnerability has been resolved: cifs: Fix missing credit release on failure in cifs_issue_read() Fix missing release of credits in the failure path in cifs_issue_read() lest retrying the subreq just overwrites the credits value.(CVE-2026-62356)

Redis contains a use-after-free vulnerability in the 'tlsProcessPendingData()' function, which handles the TLS pending-data list if Redis is configured with TLS support. A remote, unauthenticated attacker may be able to execute arbitrary commands with the privileges of the Redis server. Fixed in Redis 8.2.9, 8.4.6, 8.6.6, 8.8.2, and 8.10.1.(CVE-2026-81934)

A vulnerability, which was classified as critical, was found in Redis up to 8.8.1/8.9.x.CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer.This is going to have an impact on confidentiality, integrity, and availability.Upgrading to version 8.10.0 eliminates this vulnerability.(CVE-2026-92925)

Record
OESA-2026-4403
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVMGASA-2026-0354 No score

Updated redis packages fix a security vulnerability

The updated package fixes security vulnerabilities, including: Miscalculated buffer size in CMSketch RDB loading may lead to heap OOB write. (CVE-2026-62356)

Record
MGASA-2026-0354
Updated
2026-11-02
OSVopenSUSE-SU-2026:11542-1 No score

redis-8.10.1-1.1 on GA media

These are all security issues fixed in the redis-8.10.1-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2026:11542-1
Updated
2026-11-02
OSVopenSUSE-SU-2026:21612-1 No score

Security update for redis

This update for redis fixes the following issues:

Changes in redis:

  • Update to 8.10.1

    Update urgency: SECURITY: There are security fixes in the release.

    • Security fixes
      • (CVE-2026-62356) Miscalculated buffer size in CMSketch RDB loading may lead to heap OOB write
      • Out-of-bounds access in TopK heap cleanup path (MOD-15410)
      • Use-after-free in the TLS pending-data list when a command closes another pending connection
      • A malicious RDB payload with an out-of-range SLOT_INFO slot id causes memory corruption during RDB loading, which may lead to Remote Code Execution
      • Vector Sets: missing node level validation when loading a vector set from RDB may lead to out-of-bounds access
      • Vector Sets: use-after-free when VREM mutates the HNSW graph while background VSIM threads are still running
      • Vector Sets: a negative hnsw_search() return was treated as a huge unsigned count, reading past the end of the result arrays
      • TLS client certificate authentication bypass: a Common Name containing an embedded NUL byte was truncated, allowing a client to authenticate as another (possibly privileged) ACL user
      • #15594 Use-after-free in the blocked-client list when reprocessing a command evicts another client blocked on the same key
  • Restrict the "modules" flavour to x86_64 and aarch64 -- RedisBloom and RedisTimeSeries abort on anything else with "only supports 64-bit architectures (x64, arm64v8)", redisjson's vendored redis-module is 64-bit only, and modules/common.mk maps no other architecture at all

  • Update to 8.10.0

    Major changes compared to 8.8

    • Compact hashes - a new hash encoding that reduces memory usage by storing hash field names just once for keys that share a schema
    • New command: HIMPORT - high-throughput compact hash bulk insertion
    • TLS peer certificate-based server-to-server authentication
    • New commands: LMOVEM, BLMOVEM - move multiple elements between lists
    • New command: SUNIONCARD - get the cardinality of the union of multiple sets
    • New command: SDIFFCARD - get the cardinality of the difference between sets
    • New command: BACKUP - node-side implementation for backup and restore based on multi-part AOF (MP-AOF)
    • XREAD, XREADGROUP - new MAXCOUNT and MAXSIZE arguments to cap the cumulative reply entries and size
    • New command: FT.ALIASLIST - get all aliases for the index
    • Stemmer support for Malay and Tagalog languages
    • JSONPath extensions
    • New commands: TS.NRANGE, TS.NREVRANGE - Query a range across multiple time series; group results by timestamp
    • New command: TS.READ - optionally blocking read
    • New command: TS.QUERYLABELS - Get a list of labels and label-values
    • New command: TS.MRANGE, TS.MREVRANGE - new EXCLUDEEMPTY argument to exclude series with no reported samples
    • Performance improvements
  • Update to 8.8.1 Security fixes

    • RedisBloom/RedisBloom#1044 Crafted RESTORE payloads in RedisBloom and TDigest may trigger out-of-bounds writes, potentially leading to remote code execution
  • Update to 8.8.0

    • New data structure: Array (@antirez)
    • Subkey notification for hash fields - field-level notifications
    • INCREX: a window counter rate limiter combining INCR, INCRBY, INCRBYFLOAT, bounds, and expiration (@raffertyyu + Redis team)
    • XNACK: a new streams command - allow consumers to explicitly release pending messages
    • ZUNION, ZINTER, ZUNIONSTORE, ZINTERSTORE: new COUNT aggregator
    • JSON.SET: new FPHA argument to specify the FP type for homogeneous FP arrays
    • TS.RANGE, TS.REVRANGE, TS.MRANGE, TS.MREVRANGE: multiple aggregators in a single command
    • FT.HYBRID KNN clause: new argument to request fewer candidates per shard
    • FT.PROFILE HYBRID: profiling support for FT.HYBRID
    • Performance improvements
  • Updated to 8.6.3 (boo#1264164 boo#1264165 boo#1264166…

Record
openSUSE-SU-2026:21612-1
Updated
2026-11-02

Affected packages

Affected packages
PackageAffectedFixed
redis
Mageia:10
before 8.6.6-1.mga10
8.6.6-1.mga10
redis
Mageia:9
before 7.2.16-1.mga9
7.2.16-1.mga9
redis
openEuler:22.03-LTS-SP4
From an advisory covering 3 CVEs
before 7.2.16-2.oe2203sp4
7.2.16-2.oe2203sp4
redis
openEuler:24.03-LTS-SP1
From an advisory covering 3 CVEs
before 7.2.16-2.oe2403sp1
7.2.16-2.oe2403sp1
redis
openEuler:24.03-LTS-SP3
From an advisory covering 3 CVEs
before 7.2.16-2.oe2403sp3
7.2.16-2.oe2403sp3
redis
openEuler:24.03-LTS-SP4
From an advisory covering 3 CVEs
before 7.2.16-2.oe2403sp4
7.2.16-2.oe2403sp4
redis
openSUSE:Tumbleweed
before 8.10.1-1.1
8.10.1-1.1
redis
openSUSE:Leap 16.0
From an advisory covering 6 CVEs
before 8.10.1-bp160.1.1
8.10.1-bp160.1.1
redis-modules
openSUSE:Leap 16.0
From an advisory covering 6 CVEs
before 8.10.1-bp160.1.1
8.10.1-bp160.1.1

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
SourceLinkDate
PoC in GitHubzsy-arch/CVE-2026-62356-POC2026-10-22

History

History
RecordedChangedSources
affected, facts
first indexedOSV, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-62356 is a high vulnerability (CVSS 7.5) in redis, published August 18, 2026. Public exploit code exists. Fixed in redis 8.6.6-1.mga10.

References

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